Molex EtherNet/IP to serial gateway to Modbus Serial Gateway User... · Molex EtherNet/IP to serial gateway 6 1. PROPERTIES 1.1. General properties Ethernet Link Bandwidth 10/100

Molex EtherNet/IP to serial gateway 1

User’s Manual

Molex EtherNet/IP to serial gateway

From Molex

Version 1.1.1 November 2017


Revision History

Date Author Changes Revision

June 13,2017 F. BADAGER Initial Release 1.0.0

September 04, 2017 S GiardManeché Modification of LED names 1.1.0

November 22, 2017 R. Bickle Corrected document properties 1.1.1

Although every effort has been made to ensure the accuracy of this document, all information is subject to change without notice. Molex takes no liability for any errors in this document or for direct, indirect, or consequential damage resulting from the use of this manual.


TABLE OF CONTENTS

1. PROPERTIES ................................................................................................... 6

1.1. GENERAL PROPERTIES .................................................................................... 6

1.2. ELECTRICAL PROPERTIES ................................................................................ 7 1.3. MECHANICAL PROPERTIES ............................................................................... 7

2. HARDWARE INSTALLATION ..................................................................... 8

2.1. CONNECTORS................................................................................................. 8 2.1.1. Power connector ................................................................................... 8 2.1.2. SERIAL connector ................................................................................. 8 2.1.3. ETHERNET RJ45 connectors P1 and P2 ............................................. 8

2.1.4. TOR input .............................................................................................. 9 2.1.5. TOR output ............................................................................................ 9

2.2. INDICATORS.................................................................................................. 10

2.2.1. Indicators on the front panel ................................................................ 10 2.2.1. Indicators on the 2 ETHERNET connectors ........................................ 10

2.3. DIP SWITCHES ............................................................................................. 10 2.3.1. Default configuration of the IP address ............................................... 11

2.3.2. Choosing the RS232/RS485 mode ..................................................... 11 2.3.3. Termination resistance ........................................................................ 12

3. ETHERNET/IP .............................................................................................. 13

3.1. OPERATING PRINCIPLE .................................................................................. 13

3.1.1. Implicit messaging ............................................................................... 13 3.1.2. Explicit messaging .............................................................................. 13

3.2. LIST OF AVAILABLE ETHERNET/IP OBJECTS ..................................................... 14 3.2.1. Identity Object ..................................................................................... 14

3.2.1.1. Instance Attributes .............................................................................. 14

3.2.1.2. Instance Services ................................................................................ 15 3.2.2. Assembly Object ................................................................................. 16

3.2.2.1. Class Attributes ................................................................................... 16 3.2.2.2. Instance list ......................................................................................... 16 3.2.2.3. Instance Attributes .............................................................................. 16

3.2.3. Connection Manager Object ................................................................ 17 3.2.3.1. Class Attributes ................................................................................... 17 3.2.3.2. Class Services .................................................................................... 17 3.2.3.3. Instance Attributes .............................................................................. 17 3.2.3.4. Instance Services ................................................................................ 17

3.2.4. MODBUS Object (Vendor specific) ..................................................... 18 3.2.4.1. Operating principle .............................................................................. 18 3.2.4.2. Class Attributes ................................................................................... 19 3.2.4.3. Class Service ...................................................................................... 19

3.2.4.4. Object-specific Services ...................................................................... 19 3.2.4.5. Read_Discrete_Inputs Service ............................................................ 19 3.2.4.6. Read_Coils Service ............................................................................. 20 3.2.4.7. Read_Input_Registers Service ............................................................ 20


3.2.4.8. Read_Holding_Registers Service ....................................................... 21

3.2.4.9. Write_Coils Service ............................................................................. 21

3.2.4.10. Write_Holding_Registers Service ........................................................ 21 3.2.4.11. Error Checking .................................................................................... 22 3.2.5. TCP/IP Interface Object ...................................................................... 23 3.2.5.1. Class Attributes ................................................................................... 23 3.2.5.2. Instance Attributes .............................................................................. 23

3.2.5.3. Instance Services ................................................................................ 24 3.2.6. Ethernet Link Object ............................................................................ 25 3.2.6.1. Class Attributes ................................................................................... 25 3.2.6.2. Class-Specific Service ........................................................................ 25 3.2.6.3. Instance list ......................................................................................... 25

3.2.6.4. Instance Attributes .............................................................................. 25 3.2.6.5. Instance Services ................................................................................ 26

4. SOFTWARE CONFIGURATION ................................................................ 27

4.1. CONFIGURATION OF THE ETHERNET/IP SCANNER ........................................... 27 4.2. INTEGRATING THE MOLEX GATEWAY IN A PROJECT .......................................... 27

4.2.1. Importing an EDS file into the engineering tool ................................... 27 4.2.2. Integrating the gateway in a configuration tool .................................... 28 4.2.2.1. Integration by network detection ......................................................... 28 4.2.2.2. Manual integration ............................................................................... 30

4.3. GENERAL CONFIGURATION OF MOLEX GATEWAY .............................................. 34 4.4. EXCLUSIVE OWNER CONNECTION FOR MODBUS MASTER MODE ...................... 35

4.4.1. Operating principle .............................................................................. 35 4.4.2. Configuration ....................................................................................... 35 4.4.3. Input assembly (TO) ......................................................................... 35

4.4.4. Output assembly (OT) ...................................................................... 36 4.4.5. Configuration assembly ....................................................................... 36

4.4.6. Setting MODBUS Master mode in a configuration tool ....................... 38 4.4.7. Behaviour of the MODBUS Master according to EtherNet/IP connection status 39

4.5. EXCLUSIVE OWNER CONNECTION FOR MODBUS SLAVE MODE ........................ 40 4.5.1. Operating principle .............................................................................. 40

4.5.2. Configuration ....................................................................................... 40 4.5.3. Input assembly (TO) ......................................................................... 40

4.5.4. Output assembly (OT) ...................................................................... 41 4.5.5. Configuration assembly ....................................................................... 41 4.5.1. Setting MODBUS Slave mode in a configuration tool ......................... 42

4.6. EXCLUSIVE OWNER CONNECTION FOR TRANSPARENT MODE ........................ 44 4.6.1. Operating principle .............................................................................. 44 4.6.2. Configuration ....................................................................................... 46

4.6.3. Input assembly (TO) ......................................................................... 46

4.6.4. Output assembly (OT) ...................................................................... 47 4.6.5. Configuration assembly ....................................................................... 47 4.6.1. Setting TRANSPARENT mode in a configuration tool ........................ 50

4.7. INPUT ONLY CONNECTION .............................................................................. 51

4.7.1. Input assembly (TO) ......................................................................... 51 4.7.2. Output assembly (OT) ...................................................................... 52

4.7.1. Configuration assembly ....................................................................... 52


4.8. LISTEN ONLY CONNECTION ............................................................................ 53

4.8.1. Input assembly (TO) ......................................................................... 53

4.8.2. Output assembly (OT) ...................................................................... 53 4.8.3. Configuration assembly ....................................................................... 53

5. DIAGNOSTIC ................................................................................................ 54

5.1. DIAGNOSTIC ON THE UDP 5628810 PORT ....................................................... 54 5.2. STATUS OF IDENTITY OBJECT, WITH EXPLICIT MESSAGING ................................ 55 5.3. STATUS IN IMPLICIT MESSAGING .................................................................... 55 5.4. INDICATORS.................................................................................................. 55 5.5. USING WEB SERVER FOR DIAGNOSTIC ............................................................. 55

5.6. DIGITAL OUTPUT DIAGNOSTIC ......................................................................... 56

6. DIGITAL INPUTS/OUTPUTS ................................................................... 57

6.1. DIGITAL OUTPUT (DO) .................................................................................. 57

6.2. DIGITAL INPUT (DI) ........................................................................................ 59

7. IP ADDRESS CONFIGURATION .............................................................. 60

7.1. CONFIGURATION VIA THE DCP PROTOCOL ...................................................... 60

7.2. APPLYING A DEFAULT IP ADDRESS USING A DIP SWITCH .................................. 61 7.3. IP CONFIGURATION VIA WEB SERVER ............................................................. 61

7.4. CONFIGURATION VIA THE ETHERNET/IP 0XF5 TCP/IP OBJECT ......................... 62

8. WEB SERVER ................................................................................................ 64

8.1. CONFIGURATION WEB PAGE ........................................................................... 64 8.2. ACCOUNT MANAGEMENT ON THE WEB SERVER................................................. 65

8.3. SYSTEM INFORMATION MENU ......................................................................... 66 8.4. NETWORK SETTINGS MENU ............................................................................ 67 8.5. SNMP INFORMATION MENU ........................................................................... 67

8.6. ETHERNET STATISTICS MENU ......................................................................... 68

8.7. ETHERNET/IP ADAPTER MENU .................................................................... 71 8.8. MODBUS MENU .......................................................................................... 72 8.9. FILE SYSTEM MENU ....................................................................................... 73 8.10. FIRMWARE UPLOAD MENU .......................................................................... 74

8.11. REBOOT MENU .......................................................................................... 75 8.12. PASSWORDS MENU .................................................................................... 75

8.13. LOGOUT MENU .......................................................................................... 76

9. FTP SERVER .................................................................................................. 77

10. SNMP AGENT ................................................................................................ 78

11. APPENDICES ................................................................................................ 80

11.1. APPENDIX A: MODBUS FRAME FORMATS ................................................ 81

11.2. APPENDIX B: MIB2 ................................................................................ 90


1. PROPERTIES

1.1. General properties

Ethernet Link

Bandwidth 10/100 Mbps, auto-negotiation, auto-polarity, auto MDI/MDIX

LEDs Active Link (orange) and activity (green)

Distances Maximum 100 m

Cable Shielded Industrial Ethernet (at least of category 5e)

Connectors 2 RJ45 sockets, with shield connexion

Supported protocols EtherNet/IP, SNMP V1, HTTP, FTP, LLDP

Switch 2 port integrated switch

Redundancy Not supported

EtherNet/IP Adapter

Type Communications Adapter

IP address control DHCP, via web interface, DCP, switch in the front, TCP/IP object

EDS file Configuration file of the device that can be downloaded from the embedded web server or the FTP server.

Max. number of input bytes

500 bytes

Max. number of output bytes

500 bytes

Minimum RPI 20 ms

Serial Link

Bandwidth 1200, 2400, 9600, 19200, 38400, 57600, 115200 baud

Data bits 7 or 8 bits

Interface RS232 or RS485. Select using the switch

Distance in RS485 Maximum of 1200 m without a repeater (depends on the datrate and the cable)

Cable Shielded twisted pair

Connector 3-contact, female plug-in terminal board

Termination resistance On the RS485 link: 150 Ω; can be set by switch

Polarisation On the RS485 link: polarised line when termination resistance is activated

Transparent Mode

End frame delimiter End of frame character, known length, on the timeout


MODBUS Mode

Bus access Master or slave

Protocol MODBUS RTU or ASCII

Transmission Half Duplex, asynchronous

Accepted functions 1, 2, 3, 4, 5, 6, 15, 16

Number of addressable slaves in the master mode

48 MODBUS slaves

Address range 1 – 247

Number of accessible MODBUS registers

1 - 125 registers in read-only mode 1 – 2000 bits in read mode 1 - 123 registers in write mode

Sending frames trigger Cyclic, on change

Bus access Master or slave

Protocol MODBUS RTU or ASCII

Transmission Half Duplex, asynchronous

Local I/O

Digital input 1 insulated Digital input

Digital output 1 configurable Digital output (output assembly or Alarm output)

File system

Capacity 9 MB

Access FTP, HTTP

1.2. Electrical properties

Power Supply

Supply voltage 24V DC ±10%

Consumption 1.7 W

Connector 3-contact (VCC, 0V, EARTH) male plug-in terminal board

Protection from polarity reversals

Yes

Protection from short-circuits

Yes

1.3. Mechanical properties

Mechanical Properties

Case type Plastic with a hatch on the front side. IP20 – DIN rail fastening

Dimensions 120 x 100 x 23 mm (l x w x h)

Weight 130 g

Storage temperature -25 °C to +70 °C

Operating temperature 0 °C to +55 °C


2. HARDWARE INSTALLATION

2.1. Connectors

Figure 1: Connectors on top of the body

2.1.1. Power connector

Pin Name Description

1 24 V DC 24V DC ±10%

2 0 VDC 0 V

3 GND Ground connection

2.1.2. SERIAL connector


1 Rx Rx RS232 (Direct-Link equipment)

2 Tx Tx RS232 (Direct-Link equipment)

3 GND RS232 ground connection

4 Shield Ground

5 Data - Signal Data - RS485

6 Data + Signal Data + RS485

Important: The shielding of the SERIAL cable must imperatively have ground connections at both ends in order to ensure correct electromagnetic disturbances protection. The pin 4 of the connector may be used. The ideal situation is to use a shield jumper screw, which is fixed at each end of the serial wire on a ground bus or a cabinet bottom plate.

2.1.3. ETHERNET RJ45 connectors P1 and P2

Pin Name

1 Tx+

2 Tx-

3 Rx+

6 Rx-

Important: The shielding of the ETHERNET cable must have ground connections at both ends in order to ensure correct resistance to electromagnetic disturbances. The body of the connector may be used. Ideally a shield jumper screw, which is fixed at each end of the Ethernet wire on a ground bus or a cabinet bottom plate, must be used.

2

3

1

2

3

4

5

6

Power Serial

1 2 3 1 2 3 4 5 6

1 2 1 2

TOR OUT TOR IN IN


Figure 2: Connectors at the bottom of the case

2.1.4. TOR input

IEC61131-2 compliant, type 1:


1 IN + Insulated TOR input (15-24V)

2 IN - Insulated TOR input, ground return

2.1.5. TOR output

IEC61131-2 compliant:


1 OUT Relay contact

2 OUT Relay contact

Breaking capacity: 0.5 A (On resistive load)

Maximum permissible current: 1.2 A

OUT 2 1

IN

2 1

+

-


2.2. Indicators

2.2.1. Indicators on the front panel

Name Lit Description Blinking Description

ON Power supply applied N/A

ETH No connection with an EtherNet/IP scanner

(1Hz)

Communication established with an application error

SERIAL No protocol activated on the serial link

(1Hz)

Error with the currently enabled serial link protocol

Until error disappears

MODBUS master

One of the scenarios is in error (timeout, exception answered, CRC error…)

For 10 seconds on error

detection MODBUS slave

exception answered to a request from a MODBUS master. Invalid frame received (invalid format, bad CRC)

For 10 seconds on error

detection TRANSPARENT

Invalid frame received (frame too long, bad CRC, no end of frame detected until timeout)

RUN

(1Hz) Firmware is running

Tx (Serial link)

Data sent on the serial link

Rx (Serial link)

Data received on the serial link

2.2.1. Indicators on the 2 ETHERNET connectors

Figure 3: ETHERNET socket with indicators built-in

2.3. DIP switches

DIP switches enable:

- Activating a default IP configuration (192.168.10.20),

- Selecting the physical media for the serial link: RS232 or RS485,

- Activating a terminating resistance and polarity of the serial line.

Figure 4: DIP switches

Link status indicator: - Switched off: no link - Switched on: link OK

Link activity indicator: - Switched off: no exchanges - Blinking: ongoing Tx/Rx


2.3.1. Default configuration of the IP address

A switch allows the setting of a default IP configuration (@IP 192.168.10.20, mask 255.255.255.0) during the start-up of Direct-Link Ethernet. The configuration is carried out in the following manner:

Switch Position Description

1 ON Default IP configuration

OFF IP configuration defined by the user

Set the DIP switch 1 to ON and power Direct-Link OFF and ON to ensure that it takes the default IP parameters into account. Important: A user may change the IP address of Direct-Link via the Web server or via the DCP protocol, when the switch is set to ON. In this case, the new IP address is used immediately, despite the switch being activated. Consider setting the switch to OFF, otherwise the default IP address shall be once again used when the device is restarted.

2.3.2. Choosing the RS232/RS485 mode

There is a switch which allows specifying the operating mode of the serial link from between RS232 or RS485 (Direct-Link is pre-set to RS485 out of the box):


2 ON RS232

OFF RS485

RS232 mode:

Figure 5: Serial network in RS232 mode

This mode can only be used in case of communication between 2 individual devices (point-to-point connection). The maximum distance in RS232 is 15 meters at 19200 baud.

Molex EtherNet/IP to Modbus

serial gateway

Serial

device

Tx

Tx Rx

Rx

Gnd Gnd

2

1

3


RS485 mode:

Figure 6: Serial network in RS485 mode

This mode is used more often as it allows connection of several slaves on the bus. It also has other advantages such as immunity to EMC disturbances and a greater inter-device distance than in RS232. The maximum distance in RS485 is 1000 meters.

2.3.3. Termination resistance

If the communication mode used is RS485, there must be a termination resistance of 150Ω at both ends of the segment (refer to the example in paragraph §2.3.2). A termination resistance is connected using DIP switches 3 and 4 (when delivered, Molex gateway is pre-set without a termination resistance).


3 – 4 (activation of the terminating resistance

+ polarisation of the line)

ON Termination + polarisation

OFF No termination and no polarisation

To ensure the proper functioning of the termination, switches 3 and 4 must be in the same position.

Figure 7: Termination resistance and polarisation of the RS485 bus


3. ETHERNET/IP

3.1. Operating principle

Molex gateway is an EtherNet/IP adapter. An EtherNet/IP Scanner can access it with implicit (deterministic) or explicit messaging (acyclic and not deterministic).

3.1.1. Implicit messaging

Implicit messaging permits data producing/consuming mechanism. The configuration of the communication (mainly type of communication, data exchanged and cycle time) is sent at the beginning of the communication with the “Forward Open” service.

As the configuration is sent only once, this communication is more efficient than explicit messaging.

The data exchange is stopped with “Forward Close” service.

Figure 8: Data exchange in implicit mode

3.1.2. Explicit messaging

Explicit messaging works as client/server. It’s used for non-real-time data access.

It allows access to specific objects (data) by using its services/attributes.

Figure 9: Data exchange in explicit mode

EtherNet/IP scanner

Molex EtherNet/IP

to serial gateway

EtherNet/IP Forward_Open

EtherNet/IP response

EtherNet/IP Forward_Close

Data Exchange IN / OUT

EtherNet/IP scanner

Molex

EtherNet/IP to serial gateway

EtherNet/IP request (Read, Write…)

EtherNet/IP response


3.2. List of available EtherNet/IP objects

3.2.1. Identity Object

Identity object (Class code 0x01) has only one instance (instance 1).

3.2.1.1. Instance Attributes

Attr ID Access

Rule Name Data Type Description of Attribute Value

01h Get Vendor ID UINT Identification of each vendor by number 8

02h Get Device Type UINT Indication of general type of product 12 (dec) 0x0C(hex)

03h Get Product Code UINT Identification of a particular product of an individual vendor 2048

04h Get Revision STRUCT of: Revision of the item the Identity Object represents

Major Revision USINT 1

Minor Revision USINT 1

05h Get Status WORD Summary status of device See Status description bellow.

06h Get Serial Number UDINT Serial number of device

07h Get Product Name SHORT_STRING Human readable identification DRL-EIP-SRM

Focus on Status attribute: This attribute represents the current status of the entire device. Its value changes as the state of the device changes. The Status attribute is a WORD, with the following bit definitions:

Identity Object Status (attr 5)

Bit (s) Called Definition

0 Owned

TRUE indicates the device (or an object within the device) has an owner. Within the Master/Slave paradigm the setting of this bit means that the Predefined Master/Slave Connection Set has been allocated to a master. Outside the Master/Slave paradigm the meaning of this bit is TBD.

1 Reserved, shall be 0

2 Configured TRUE indicates the application of the device has been configured to do something different than the “out–of–box” default. This shall not include configuration of the communications.

3 Reserved, shall be 0

4 – 7 Extended Device

Status

Vendor–specific or as defined by Table. The EDS shall indicate if the device follows a vendor-specific definition for these bits by using the DeviceStatusAssembly keyword.

8 Minor

Recoverable Fault

TRUE indicates the device detected a problem with itself, which is thought to be recoverable. The problem does not cause the device to go into one of the faulted states. See Behavior section.

9 Minor

Unrecoverable Fault

TRUE indicates the device detected a problem with itself, which is thought to be unrecoverable. The problem does not cause the device to go into one of the faulted states. See Behavior section.

10 Major

Recoverable Fault

TRUE indicates the device detected a problem with itself, which caused the device to go into the “Major Recoverable Fault” state. See Behavior section.

11 Major

Unrecoverable Fault

TRUE indicates the device detected a problem with itself, which caused the device to go into the “Major Unrecoverable Fault” state. See Behavior section.

12 - 15 Extended Device

Status 2

Reserved - (shall be 0) or vendor-specific. The EDS shall indicate if the device follows a vendor-specific definition for these bits by using the DeviceStatusAssembly2 keyword as defined in Section 7-3.6.3, Device Description Section.


Extended Device Status (Field (bits 4-7) in Status Instance Attribute)

Extended Device Status 0 Self-Testing or Unknown 1 Firmware Update in Progress 2 At least one faulted I/O connection 3 No I/O connections established 4 Non-Volatile Configuration bad

5 Major Fault – either bit 10 or bit 11 is true (1)

6 At least one I/O connection in run mode

7 At least one I/O connection established, all in idle mode

8-9 Reserved

10-15 Vendor specific status

3.2.1.2. Instance Services

Service Code

Service Name Description of Service

01h Get_Attributes_All Returns a predefined listing of this objects attributes (See the Get_Attributes_All Response definition below)

05h Reset 1 Invokes the Reset service for the device.

0Eh Get_Attribute_Single Returns the contents of the specified attribute. 1: Only the reset type 0 is supported


3.2.2. Assembly Object

3.2.2.1. Class Attributes

Attr ID Access Rule Name Data Type Description of Attribute Value

01h Get Revision UINT Revision of this object 2

02h Get Max Instance UINT Maximum instance number of an object currently created in this class level of the device.

199

03h Get Number of instances

UINT Number of object instances currently created at this class level of the device.

9

3.2.2.2. Instance list

Instance ID Name Direction Comments

0x65 (101) INPUT T->O Data from the target to the originator

0x66 (102) OUTPUT O->T Data from the originator to the target

0x67 (103) STATUS T->O Status from the target to the originator

0x68 (104) Configuration MODBUS Master

O->T MODBUS Master configuration assembly

0x69 (105) Configuration MODBUS Slave

O->T MODBUS Slave configuration assembly

0x6A (106) Configuration TRANSPARENT

O->T TRANSPARENT configuration assembly

0x6B (107) Dummy Configuration O->T Configuration assembly for IO and LO

0xC6 (198) Heartbeat - Input only O->T Heartbeat

0xC7 (199) Heartbeat - Listen only O->T Heartbeat


Attr ID Access Rule Name Data Type Description of Attribute

03h Set Data ARRAY of BYTE There isn’t any endian conversion on the bytes.


3.2.3. Connection Manager Object

Connection Manager object (Class code 0x06) has only one instance (instance 1)


Attr ID Access Rule Name Data Type Description of Attribute Value



1

03h Get Number of instances

UINT Number of object instances currently created at this class level of the device.

1

3.2.3.2. Class Services

Service Code Service Name Service Description

01hex Get_Attributes_All Returns the contents of all attributes of the class.

0Ehex Get_Attribute_Single Used to read a Connection Manager Class attribute value.


Attr ID Access Rule

Attribute Name Data Type

Description of Attribute

01h Get Open Requests UINT Number of Forward Open service requests received.

02h Get Open Format Rejects UINT Number of Forward Open service requests which were rejected due to bad format.

03h Get Open Resource Rejects

UINT Number of Forward Open service requests which were rejected due to lack of resources.

04h Get Open Other Rejects UINT Number of Forward Open service requests which were rejected for reasons other than bad format or lack of resources.

05h Get Close Requests UINT Number of Forward Close service requests received.

06h Get Close Format Requests

UINT Number of Forward Close service requests which were rejected due to bad format.

07h Get Close Other Requests

UINT Number of Forward Close service requests which were rejected for reasons other than bad format.

08h Get Connection Timeouts UINT Total number of connection timeouts that have occurred in connections controlled by this Connection Manager


Common services Service Code Service Name Service Description

01hex Get_Attributes_All Returns the contents of all attributes of the class.

0Ehex Get_Attribute_Single Used to read a Connection Manager Object instance attribute.

Object specific services Service Code Service Name Service Description

4Ehex Forward_Close Closes a connection

52hex Unconnected_Send Unconnected Send Service. Only originating devices and devices that route between links need to implement

54hex Forward_Open Opens a connection, maximum data size is 511 bytes

Forward Open service parameters: Network connection parameters:

- Fixed/Variable: only fixed size for the amount of data on the connection. - Priority: Not supported - Redundant owner: Not supported.

Connection Path: - Only path to assembly object is supported.


3.2.4. MODBUS Object (Vendor specific)

The MODBUS object provides an interface to MODBUS equipments connected to the serial port. Services are provided that directly correspond to the most common MODBUS commands. MODBUS object is a “vendor specific” object with a class code 0x64. Only one instance is available in the gateway (instance 0).

Figure 10 - MODBUS device

This object supports the following MODBUS functions as EtherNet/IP services:

- 1: Read coils

- 2: Read Discrete Inputs

- 3: Read Holding Registers

- 4: Read Input Registers

- 15: Write Multiple Coils

- 16: Write Multiple Registers

3.2.4.1. Operating principle

By using explicit messaging through the MODBUS Object, the user has access to any data of any MODBUS slave equipment.

This functionality is available only if the scanner has opened an EO connection corresponding to Master configuration.


Figure 45: Data exchange in the EtherNet/IP to serial link Gateway, with MODBUS master EO connection started


Attr ID Access



02h Get Max Instance UINT Maximum instance number of an object currently created in this class level of the device

1

03h Get Number of Instances

UINT Number of object instances currently created at this class level of the device 1

3.2.4.3. Class Service

Service Code

Service name Description of Service

0x0E Get_Attribute_Single Returns the contents of the specified attribute.

3.2.4.4. Object-specific Services

The MODBUS Object provides the following Object-specific services:

Service Code Service Name Description of Service

4B hex Read_Discrete_Inputs 1 Reads one or more contiguous discrete input(s). MODBUS function 2

4C hex Read_Coils 1 Reads one or more contiguous coil(s). MODBUS function 1

4D hex Read_Input_Registers 1, 2 Reads one or more contiguous input register(s). MODBUS function 4

4E hex Read_Holding_Registers 1, 2 Reads one or more contiguous holding register(s). MODBUS function 3

4F hex Write_Coils 1 Writes one or more contiguous coil(s). MODBUS function 15

50 hex Write_Holding_Registers 1, 2 Writes one or more contiguous holding register(s). MODBUS function 16

Table Footnotes: 1 The parameter data of these services shall be little-endian. Since MODBUS data is big-endian, the MODBUS Object swaps bytes when

sending the message to the MODBUS subsystem. 2 The response data of these services shall be little-endian. Since MODBUS data is big-endian, the MODBUS Object swaps bytes after

receiving a response from the MODBUS subsystem.

3.2.4.5. Read_Discrete_Inputs Service

This service reads one or more discrete inputs from the MODBUS Discrete Inputs table. This service is the equivalent of a Read Discrete Inputs function (function code 0x02) on MODBUS.

Read_Discrete_Inputs Request Service Parameters

Name Data Type Description of Request Parameter Semantics of Values

Slave Address UINT Address of the slave device

Starting Address UINT Offset in table to begin reading from.1 Zero based

EtherNet/IP scanner


Slave MODBUS serial response

OutputsEIP response

Array of data Slave Addr

D

CRC MOD

MODBUS PDU Slave Addr

CRC MOD

Modbus serial slave

Slave Addr

Offset Length


Quantity of Inputs UINT Number of inputs to read1

Table Footnotes: 1 The Request Parameter is little endian. The MODBUS protocol is big endian.

Read_Discrete_Inputs Response Service Parameters


Input Values ARRAY of octet Input values read. Each input is packed as a bit within a byte.

3.2.4.6. Read_Coils Service

This service reads one or more coils from the MODBUS Coils table. This service is the equivalent of a Read Coils function (function code 0x01) on MODBUS.

Read_Coils Request Service Parameters




Quantity of Coils UINT Number of coils to read 1

Table Footnotes:

1 The Request Parameter is little endian. The MODBUS protocol is big endian. The implementer may have to swap bytes depending on the

MODBUS subsystem implementation.

Read_Coils Response Service Parameters


Coil Status ARRAY of octet Coil values read. Each input is packed as a bit within a byte.

3.2.4.7. Read_Input_Registers Service

This service reads one or more input registers from the MODBUS Input Register table. This service is the equivalent of a Read Input Registers function (function code 0x04) on MODBUS.

Read_Input_Registers Request Service Parameters




Quantity of Input Registers UINT Number of input registers to read 1

Table Footnotes:

1 The Request Parameter is little endian. The MODBUS protocol is big endian.

Read_Input_Registers Response Service Parameters


Input Register Values ARRAY of 16-bit word1 Input register values read1,2

Table Footnotes:

1 The data is returned as 16 bit entities for each register. The actual data type of the values is unknown.

2 The Response Data is little endian. The MODBUS protocol is big endian.


3.2.4.8. Read_Holding_Registers Service

This service reads one or more holding registers from the MODBUS Holding Register table. This service is the equivalent of a Read Holding Registers function (function code 0x03) on MODBUS. The service parameter data shall be received in little-endian format. The response data shall be an array of 16-bit words sent as a little-endian value.

Read_Holding_Registers Request Service Parameters




Quantity of Holding Registers

UINT Number of holding registers to read 1

Table Footnotes:


MODBUS subsystem implementation.

Read_Holding_Registers Response Service Parameters


Holding Register Values ARRAY of 16-bit word 1 Holding register values read 2

Table Footnotes:

1 The data is returned as 16 bit entities for each register. The actual data type of the values is unknown.

2 The Response Data is little endian. The MODBUS protocol is big endian. The implementer may have to swap bytes depending on the

MODBUS subsystem implementation

3.2.4.9. Write_Coils Service

This service writes one or more coils to the MODBUS Coils table. This service is the equivalent of a Write Multiple Coils function (function code 0x0F) on MODBUS. If the Quantity of Outputs field is 1, it can be considered a Write Single Coil function (function code 0x05).

Write_Coils Request Service Parameters



Starting Address UINT Offset in table to begin writing to 1 Zero based

Quantity of Outputs UINT Number of output coils to write 1

Output Values ARRAY of octet Output coil values

Table Footnotes:


MODBUS subsystem implementation

Write_Coils Response Service Parameters


Starting Address UINT Offset in table where writing began 1 Zero based

Quantity of Outputs UINT Number of output coils written 1

Table Footnotes:

1 The Response Parameters are little endian. The MODBUS protocol is big endian. The implementer may have to swap bytes depending on

the MODBUS subsystem implementation.

3.2.4.10. Write_Holding_Registers Service


This service writes one or more holding registers to the MODBUS Holding Registers table. This service is the equivalent of a Write Multiple Registers function (function code 0x10) on MODBUS. If the Quantity of Outputs field is 1, it can be considered a Write Single Register function (function code 0x06).

Write_Holding_Registers Request Service Parameters



Starting Address UINT Offset in table to begin writing to 2 Zero based

Quantity of Outputs UINT Number of output registers to write 2

Output Values ARRAY of 16-bit word 1 Output register values

Table Footnotes:

1 The data is returned as 16 bit entities for each register. The actual data type of the values is unknown

2 The Request Parameter is little endian. The MODBUS protocol is big endian.

Write_Holding_Registers Response Service Parameters


Starting Address UINT Offset in table where writing began1 Zero based

Quantity of Outputs UINT Number of output registers written 1

Table Footnotes:

1 The Response Parameters are little endian. The MODBUS protocol is big endian.

3.2.4.11. Error Checking

General Error Code Description

0x20 Invalid Parameter: • Requesting zero (0) quantity of data values • Requesting more data values than can be supported by MODBUS; for example requesting to read

500 holding registers. • Any request where combining the start of the data offset with the quantity of data would cause an

overflow, for example requesting to read 100 registers starting at offset hex 0xFFFF.

0x13 Not Enough Data: Write requests where the bytes of attached data do not properly match the quantity of data values being written; for example, requesting to write 4 registers but supplying any number of data bytes other than 8.

0x15 Too Much Data: Write requests where the bytes of attached data do not properly match the quantity of data values being written; for example, requesting to write 4 registers but supplying any number of data bytes other than 8.


3.2.5. TCP/IP Interface Object

TCP/IP Interface object (Class code 0xF5) has only one instance (instance 1).


Attr ID Access

Rule Name

Data Type

Description of Attribute Value

01h Get Revision UINT 4


1

03h Get Number of Instances

UINT Number of object instances currently created at this class level of the device. 1


Attr ID Access

Rule Name

Data Type

Description of Attribute Value

01 Get Status DWORD Interface status

02 Get Configuration Capability

DWORD Interface capability flags See table below

03 Set Configuration Control

DWORD Interface control flags See table below

04 Get Physical Link Object

STRUCT of:

Path to physical link object (20h F6h 24h 01h ) [20] = 8 bit class segment type [F6] = Ethernet Link Object class [24] = 8 bit instance segment type [01] = instance 1.

Path size UINT Size of Path

Path Padded EPATH

Logical segments identifying the physical link object

05 Set Interface Configuration

STRUCT of:

TCP/IP network interface configuration.

IP Address UDINT The device’s IP address.

Network Mask UDINT The device’s network mask

Gateway Address

UDINT Default gateway address

Name Server UDINT Primary name server

Name Server 2 UDINT Secondary name server

Domain Name STRING Default domain name

06 Set Host Name STRING Host name

13 Set Encapsulation Inactivity Timeout

UINT Number of seconds of inactivity before TCP connection is closed

0 = Disable 1-3600 = timeout in seconds Default = 120

Configuration Capability Instance Attribute (attribute 2)

Bit(s): Called: Definition DRL-EIP capabilities

0 BOOTP Client 1 (TRUE) shall indicate the device is capable of obtaining its network configuration via BOOTP.

TRUE

1 DNS Client 1 (TRUE) shall indicate the device is capable of resolving host names by querying a DNS server.

FALSE (not supported by DRL-EIP gateway)

2 DHCP Client 1 (TRUE) shall indicate the device is capable of obtaining its network configuration via DHCP.

TRUE

3 DHCP-DNS Update

1 (TRUE) shall indicate the device is capable of sending its host name in the DHCP request as documented in Internet draft <draft-ietf-dhc-dhcp-dns-12.txt>.

FALSE (not supported by DRL-EIP gateway)

4 Configuration Settable

1 (TRUE) shall indicate the Interface Configuration attribute is settable. Some devices, for example a PC or workstation, may not allow the Interface Configuration to be set via the TCP/IP Interface Object.

TRUE

5-31 Reserved Reserved for future use and shall be set to zero.


Configuration Control Instance Attribute (attribute 3) Bit(s): Called: Definition

0-3 Startup Configuration

Determines how the device shall obtain its initial configuration at start up.

0 = The device shall use the interface configuration values previously stored (for example, in non-volatile memory or via hardware switches, etc).

1 = The device shall obtain its interface configuration values via BOOTP.

2 = The device shall obtain its interface configuration values via DHCP upon start-up.

3-15 = Reserved for future use.

4 DNS Enable If 1 (TRUE), the device shall resolve host names by querying a DNS server.

5-31 Reserved Reserved for future use and shall be set to zero.


Service Code

Service name Description of Service

0x01 Get_Attribute_All Returns a predefined listing of this objects attributes


0x10 Set_Attribute_Single Modifies a single attribute.


3.2.6. Ethernet Link Object

Ethernet Link object (Class code 0xF6) has two instances, one for each physical port (instance 1 for port 1 and instance 2 for port 2).


Attr ID Access



02h Get Max Instance UINT Maximum instance number of an object currently created in this class level of the device

2

03h Get Number of Instances UINT Number of object instances currently created at this class level of the device

2

3.2.6.2. Class-Specific Service


0x4C Get_and_Clear Gets then clears the specified attribute (Interface Counters or Media Counters).

The Get_and_Clear service is a class-specific service. It is only supported for the Interface Counters and Media Counters attributes. The Get_and_Clear response shall be the same as the Get_Attribute_Single response for the specified attribute. After the response is built, the value of the attribute shall be set to zero.

3.2.6.3. Instance list

Instance ID Name Comments

1 Ethernet Link Object – Port 1 Port 1

2 Ethernet Link Object – Port 2 Port 2


Attr ID Access


01h Get Interface Speed UDINT Interface speed currently in use 10, 100

02h Get Interface Flags DWORD Interface status flags

03h Get Physical Address ARRAY of 6 USINTs

MAC layer address

04h Get Interface Counters STRUCT of:

In Octets UDINT Octets received on the interface

In Ucast Packets UDINT Unicast packets received on the interface

In NUcast Packets UDINT Non-unicast packets received on the interface

In Discards UDINT Inbound packets received on the interface but discarded

In Errors UDINT Inbound packets that contain errors (does not include In Discards)

In Unknown Protos UDINT Inbound packets with unknown protocol

Out Octets UDINT Octets sent on the interface

Out Ucast Packets UDINT Unicast packets sent on the interface

Out NUcast Packets UDINT Non-unicast packets sent on the interface

Out Discards UDINT Outbound packets discarded

Out Errors UDINT Outbound packets that contain errors

05h Get Media Counters STRUCT of: Media-specific counters

Alignment Errors UDINT Frames received that are not an integral number of octets in length

FCS Errors UDINT Frames received that do not pass the FCS check

Single Collisions UDINT Successfully transmitted frames which experienced exactly one collision

Multiple Collisions UDINT Successfully transmitted frames which experienced more than one collision

SQE Test Errors UDINT Number of times SQE test error message is generated

Deferred Transmissions UDINT Frames for which first transmission attempt is delayed because the medium is busy

Late Collisions UDINT Number of times a collision is detected later than 512 bittimes into the transmission of a packet

Excessive Collisions UDINT Frames for which transmission fails due to excessive collisions


MAC Transmit Errors UDINT Frames for which transmission fails due to an internal MAC sublayer transmit error

Carrier Sense Errors UDINT Times that the carrier sense condition was lost or never asserted when attempting to transmit a frame

Frame Too Long UDINT Frames received that exceed the maximum permitted frame size

MAC Receive Errors UDINT Frames for which reception on an interface fails due to an internal MAC sublayer receive error

07h Get Interface Type USINT Type of interface: twisted pair, fiber, internal, etc

08h Get Interface State USINT Current state of the interface: operational, disabled, etc

10h Get Interface Label SHORT_STRING

Human readable identification port-001 port-002



0x01 Get_Attribute_All Returns a predefined listing of this objects attributes


0x10 Set_Attribute_Single Modifies a single attribute.


4. SOFTWARE CONFIGURATION

4.1. Configuration of the EtherNet/IP Scanner

The following detailed configuration was carried out using the "Logix Designer" software from Rockwell. The procedure is similar for many configuration softwares.

4.2. Integrating the Molex gateway in a project

4.2.1. Importing an EDS file into the engineering tool

The EDS file allows using Molex gateway as an EtherNet/IP Adapter.

This file called Direct-Link-EIP.eds can be found inside the device. See quick start guide.

The EDS file can also be accessed via the web server of the Molex gateway (refer to paragraph 10).

This EDS file can be imported in Logix Designer in order to speed up the configuration of the gateway.

1) Open the EDS Wizard

ToolsEDS Hardware Installation Tool


2) Follow the procedure

4.2.2. Integrating the gateway in a configuration tool

4.2.2.1. Integration by network detection

This can be done if the equipment is connected to the network and powered up.

1. Turn the scanner “Online”

1


2. Select Network Detection tab

3. Click on the button “Read Network Configuration”

4. Click OK on the following message

5. Then the detection starts and should discover at least the expected device.

6. Drag and drop the new device to the main window

2

3

4


7. The following configuration window will open:

4.2.2.2. Manual integration

Prerequisite: The .eds file of the gateway shall be added in the configuration tool (see 4.2.1).

1. Right click on the Ethernet Item and Select “New Module…”.


2. Select the Gateway in the Catalog (you can use the filter with DRL-EIP. Then click on create.

3. The following configuration window will open:

Then fill-in the different tabs:

• General (IP address, connections, name)


Choose a connection type. This will define the way the gateway is used (see §4.3). The associated tags will be used to identify the assemblies.

• Connection (RPI, Unicast/Multicast, Trigger)

• Module Info


Note: Only available if the scanner is “On Line”

• Internet Protocol


• Port Configuration



4.3. General configuration of Molex gateway

The gateway is configured through one Exclusive Owner (EO) connection.

3 EO connections instances are available, each corresponding to a communication mode on the serial link:

- Gateway configured in MODBUS Master mode

- Gateway configured in MODBUS Slave mode

- Gateway configured in Transparent mode

In addition to this EO connection, it is possible to add a Listen Only (LO) and an Input Only (IO) connection.

- Listen Only is used together with an EO connection to consume the same assembly as the EO input assembly.

- Input Only connection can be used to get the Status Assembly (see configuration for Input Only)


4.4. Exclusive owner connection for MODBUS Master mode

4.4.1. Operating principle

Figure 11: Operating principle in the MODBUS Master mode

4.4.2. Configuration

In order to use the Molex Gateway in the MODBUS Master mode, add the Exclusive Owner – MODBUS Master connection.

The properties of the connection are:

EO MODBUS master

Assembly instance Conf 0x68 (104)

OT 0x66 (102)

TO 0x65 (101)

Default size 400 1 1

Min size 400 1 1

Max size 400 500 500

path 20 04 24 68 2C 66 2C 65

4.4.3. Input assembly (TO)

The input assembly is defined as follows:

0 - 497 bytes 3 bytes

MODBUS data (IN) Digital input

(1 byte) General status

(2 bytes)

Assembly size: 3 to 500 bytes

In this mode, all informations are mandatory: - The Digital input and General status will always be in the assembly. See 4.7.1 for General

status description. - The size of « MODBUS data (IN) » is directly affected by the assembly size defined by the

user.

Warning: According to these rules if the user doesn’t need to use « MODBUS data (IN) » then he will have to set an assembly size of 3 bytes at least else an error will be reported during the «Open Forward response ».


Output Assembly

Input Assembly

Master MODBUS

EtherNet/IP Adapter

Modbus slave

MODBUS registers

EtherNet/IP Scanner

Outputs 1 to 500 bytes

Inputs 3 to 500 bytes

MODBUS write request

MODBUS read request

Response

Response

OUTPUT

ASSEMBLY

INPUT

ASSEMBLY


4.4.4. Output assembly (OT)

The output assembly is defined as follows:

0 – 499 bytes (*) 1 byte

« MODBUS data (OUT) » Digital output


(*)The size of « MODBUS data (OUT) » is defined by the scenario configuration. If the number of bytes in « MODBUS data (OUT) » is higher than 499, the end of the assembly will be truncated or removed. Note:

Even if it is recommended to match the Assembly’s size with amount of data configured in the scenarios, it is not mandatory. Therefore the “MODBUS data OUT” field will be incomplete and the data for some scenarios not updated.

4.4.5. Configuration assembly

This assembly is used to configure the serial interface, MODBUSprotocol, each request/reply (scenario) that the MODBUS master has to manage, and the digital output mode.. It allows configuring up to 48 scenarios.

The configuration assembly is defined as follows:

Byte offset

0 1 2 … 399

Baudrate Parity Stop bits … Scen48 : Qty of bits or registers

Assembly size: 400 bytes

Detailed description of the configuration assembly:

Category Name Type Byte offset Default value

Value range

Serial link settings

Baudrate U8 0 5

in bauds : 0 : 600 1 : 1200 2 : 2400 3 : 4800 4 : 9600 5 : 19200 6 : 38400 7 : 57600 8 : 115200

Parity U8 1 1 0 : none 1 : even 2 : odd

Stop bits U8 2 0 0 : 1 stop 1 : 2 stops

Data bits U8 3 0 0 : 8 bits 1 : 7 bits

Inter-char timeout U16 4 0 0 : 1,5 chars time >0 in ms : added to 1,5 chars time

Inter-frame silence1 U16 6 0 0 : 3,5 chars time >0 in ms : added to 1,5 chars time

Timeout U16 8 1000 20 to 65535

Retries U8 10 2 0 to 3

MODBUS settings

Protocol U8 11 0 0 : RTU 1 : ASCII


Category Name Type Byte offset Default value

Value range

EtherNet/IP settings

Digital output mode U8 12 0

0 : disabled 1 : On EtherNet/IP failure 2 : On Serial-link failure 3 : EtherNet/IP or Serial-link failure 4 : set by EtherNet/IP output assembly

Reserved Reserved U8 13 0 Not checked

Reserved U8 14 0 Not checked

Reserved U8 15 0 Not checked

Scenario N (1 to 48)

ScenN : MODBUS function U8 16 + ((N-1) * 8) 0

0 : scenario is not activated 1 : Read Coils (1) 2 : Read Discrete Inputs (2) 3 : Read Holding Registers (3) 4 : Read Input Register (4) 5 : Write Single Coil (5) 6 : Write Single Register (6) 7 : Write Multiple Coils (15) 8 : Write Multiple Registers (16)

ScenN : Slave address U8 17 + ((N-1) * 8) 1 0 to 247

ScenN : Frame trigger U8 18 + ((N-1) * 8) 0 0 : each cycle 1 : on change

ScenN : Cycle time U8 19 + ((N-1) * 8) 0

0: 100ms 1: 500ms 2: 1s 3: 5s 4: 10s 5: 30s 6: 60s 7: Polling

ScenN : Address of 1st bit or reg U16 20 + ((N-1) * 8) 0 0 to 65535

ScenN : Qty of bits or registers U16 22 + ((N-1) * 8) 0 1 to 2000

1: Set the “Interframe silence” parameter to specify the minimum time delay taken into account by Molex gateway to send a new MODBUS request to a slave after having received the last response (refer to the figure given below):

Figure 12: Interframe silence in MODBUS Master mode


4.4.6. Setting MODBUS Master mode in a configuration tool

Using the EDS file simplifies dramatically the configuration. Dropdown menus allow a quick choice of the right parameters for your application. However, this is not possible in all configuration tools.

In this case, each byte of the configuration assembly has to be set by hand. In order to help with this process, you can use the configuration sheet template file, available in the equipment itself (use webserver or ftp). You can also download it from MOLEX website.

In the configuration tool, select “Controller Tags” ...

... and then fill-in all bytes with the configuration data.


4.4.7. Behaviour of the MODBUS Master according to EtherNet/IP

connection status

The MODBUS Master of Molex gateway operates according to the EtherNet/IP connection state.

As the configuration is received during the opening of an EO connection, the serial communication is possible only during an opened EO IO connection with valid configuration.

Therefore, if for any reason (Ethernet link-down, scanner shutdown, connection closed...) the communication between the scanner and the gateway falls, then the MODBUS master stops.


4.5. Exclusive owner connection for MODBUS Slave mode


Figure 13: Molex Gateway operating principle in the MODBUS Slave mode


In order to use the Molex Gateway in the MODBUS slave mode, add the Exclusive Owner – MODBUS Slave connection.


EO MODBUS master

Assembly instance Conf 0x69 (105)

OT 0x66 (102)

TO 0x65 (101)

Default size 12 1 3

Min size 12 1 3

Max size 12 500 500

path 20 04 24 69 2C 66 2C 65



0 – 497 bytes 3 bytes

MODBUS data (IN)

Digital input (1 byte)

General status (2 bytes)


In this mode all information’s are mandatory:


MODBUS Slave

EtherNet/IP Adapter

MODBUS Master

MODBUS registers

EtherNet/IP

Scanner

Inputs 3 to 499 bytes

OUTPUT

ASSEMBLY

INPUT

ASSEMBLY

MODBUS read request

MODBUS write request

Response

Response

0x0000

Input Assembly

0x03FF

0x0400

Output Assembly

0x07FF

Outputs 1 to 499 bytes


- The Digital input and General status will always be in the assembly. See 4.7.1 for General status description.

- The size of « MODBUS data (IN) » is directly affected by the assembly size defined by the user.

Warning: According to these rules if the user doesn’t need to use « MODBUS data (IN) » then he will have to set an assembly size of 3 bytes at least else an error will be reported during the «Open Forward response ».



0 – 499 bytes 1 byte

« MODBUS data (OUT) » Digital output


In this mode all informations are mandatory: - The « Digital output » will always be in the assembly. - The size of « MODBUS data (OUT) » is directly affected by the assembly size defined by the

user

Warning: According to these rules if the user doesn’t need to use « MODBUS data (OUT) » then he will have to set an assembly size of 1 byte at least else an error will be reported during the «Open Forward response ».


This assembly is used to configure the serial interface, and the digital output mode.


Byte offset

0 1 2 … 11 Baudrate Parity Stop bits … Reserved



Category Name Type Byte offset Default value Value range


Baudrate U8 0 5

in bauds : 0 : 600 1 : 1200 2 : 2400 3 : 4800 4 : 9600 5 : 19200 6 : 38400 7 : 57600 8 : 115200




Inter-chars timeout U16 4 0 0 : 1,5 chars time >0 in ms : added to 1,5 chars time



Inter-frame silence U16 6 0 0 : 3,5 chars time >0 in ms : added to 1,5 chars time

MODBUS settings Protocol U8 8 0

0 : RTU 1 : ASCII

MODBUS Slave Address U8 9 1 1 - 247


Digital output mode

U8

10

0



4.5.1. Setting MODBUS Slave mode in a configuration tool


Example of Dropdown menus in a user friendly configuration tool




... and then fill the 12 bytes with the configuration data.


4.6. Exclusive owner connection for TRANSPARENT mode


This mode can be used when the serial equipment does not support MODBUS. Data exchange can be full duplex, without the master/slave relation.

In this case, the serial frame is completely transmitted from the PLC to the serial equipment, and vice-versa. Different ways can be used to detect the end of a frame, and when to forward it. Also, it is required to define the maximum size of frames received/sent. This must be configured.

- Case in which the end of frame is detected using a specific character:

Figure 14: Molex Gateway operating principle in the transparent mode

In this example, the end of frame character is the ASCII “CR” code (0x0D).

After receiving the 1st byte on the serial link:

- If no byte is received during the timeout configured in the serial link configuration, an error is reported and the incomplete frame is not sent on EtherNet/IP.

- If the received frame length is greater than the Input Assembly size and if the received frame is valid, an error is reported and the frame is truncated.

If a change is detected in the Output Assembly:

• If there is an end of frame character in the frame, the data is sent on the serial link from the 1st byte up to the end of frame character (EOF) (included). Any data after the EOF is ignored.

- Case in which the frame length is known:

Figure 15: data format when frame length is known

Molex EtherNet/IP to serial

gateway

Output Assembly

Input Assembly

Serial link

EtherNet/IP

Adapter

Up to 500 bytes

Up to 500 bytes

Inputs

Outputs

OUTPUT ASSEMBLY

INPUT ASSEMBLY

34 55 66 CR …

Frame received from the serial link

10 44 25 CR…

Frame sent on the serial link

10 44 25 CR … …

34

55

66

CR … …


gateway

Serial link

EtherNet/IP adapter

EtherNet/IP Scanner

Up to 500 bytes

Up to 500 bytes

Inputs

Outputs

03 55 66 84


04

44 25 56

33


04 44 25 56 33 …

03

55

66

… 84

…

Output Assembly

Intput Assembly

OUTPUT ASSEMBLY

INPUT ASSEMBLY

EtherNet/IP Scanner


The 1st byte must contain the number of bytes that follow.


- If the expected bytes are not received after the timeout configured in the serial link configuration, an error is reported and the incomplete frame is not sent on EtherNet/IP.

- If the received frame length is greater than the number of Input Assembly size and if the received frame is valid, an error is reported and the frame is truncated.


- If the 1st byte has a length greater than the Output Assembly, an error is reported and no data is sent.

- Case in which the end of frame is detected on timeout:

Figure 16: data format when EOF is detected on timeout

The 1st byte of the Input Assembly indicates the number of bytes received. The 1st byte of the Output Assembly must indicate the number of bytes to be sent.


- If no byte is received during the timeout configured in the serial link configuration, the number of received characters is recorded in the 1st byte of the Input Assembly, after which the received data is sent on EtherNet/IP.

- If the length of the received frame plus a length byte is greater than the size of Input Assembly, an error is reported and the frame is truncated.


- If the 1st byte has a length greater than the Output Assembly size, an error is reported and no data is sent. Otherwise, a frame is sent on the serial line.


gateway

Serial link

EtherNet/IP Adapter

EtherNet/IP Scanner

Up to 500 bytes

Up to 500 bytes

Inputs

Outputs

OUTPUT ASSEMBLY

INPUT ASSEMBLY

55 66 84


44 25 56

33


04 44 25 56 33 …

03

55

66

… 84

…

Output Assembly

Intput Assembly


- Trigger function of the frame counter:

A frame trigger, when activated, is added at the beginning of the Input and Output Assemblies. This byte is incremented for each new available frame. It is used to report the presence of a new received frame or to detect a new frame to be sent.

Figure 17: data format when trigger function is activated (recommended use)

Ti = input trigger To = output trigger

In this example, the length of the frames is known. The byte encoding the length in the Input and Output Assemblies is located at byte no. 2, after the trigger byte.


In order to use the Molex Gateway in the Transparent mode, add the Exclusive Owner – Transparent connection.


EO Transparent

Assembly instance Conf 0x6A (106)

OT 0x66 (102)

TO 0x65 (101)

Default size 16 1 3

Min size 16 1 3

Max size 16 251 253

path 20 04 24 6A 2C 66 2C 65



0 – 250 bytes 3 bytes

« SERIAL data (IN) »

Digital input (1 byte)

General status (2 bytes)


In this mode all informations are mandatory: - The Digital input and General status will always be in the assembly. See 4.7.1 for General

status description. - The size of « SERIAL data (IN) » is directly affected by the assembly size defined by the user.


gateway

Serial link

EtherNet/IP

Adapter

EtherNet/IP Scanner

Up to 500 bytes

Up to 500 bytes

Inputs

Outputs

OUTPUT ASSEMBLY

INPUT ASSEMBLY

03 55 66 84


04

44 25 56

33


To 04

44

33

25

56

Ti 03

55

84 66

…

Output Assembly

Intput Assembly


Warning: According to these rules if the user doesn’t need to use « SERIAL data (IN) » then he will have to set an assembly size of 3 bytes at least else an error will be reported during the «Open Forward response ».



0 – 250 bytes 1 byte

« SERIAL Data (OUT) » Digital output


In this mode all informations are mandatory: - The « Digital output » will always be in the assembly. - The size of « SERIAL data (OUT) » is directly affected by the assembly size defined by the

user.

Warning: According to these rules if the user doesn’t need to use « SERIAL data (OUT) » then he will have to set an assembly size of 1 byte at least else an error will be reported during the «Open Forward response ».


This assembly is used to configure the serial interface, the transparent mode settings, and the digital output mode.


Byte offset

0 1 2 … 15 Baudrate Parity Stop bits … Reserved





Baudrate U8 0 5

in bauds : 0 : 600 1 : 1200 2 : 2400 3 : 4800 4 : 9600 5 : 19200 6 : 38400 7 : 57600 8 : 115200




Inter-chars timeout U16 4 0 0 : 1,5 chars time >0 in ms : added to 1,5 chars time

Inter-frame silence U16 6 0 0 : 3,5 chars time >0 in ms : added to 1,5 chars time

EOF timeout (in ms) U16 8 100 0 - 65535



TRANSPARENT mode settings

EOF delimiter 1 U8 10 3

0 : NULL (0x00 or '\0') 1 : SPACE (0x20) 2 : LF (0x0A) 3 : CR (0x0D) 4 : CR LF 5 : LF CR 6 : User defined 7 : Length in 1st byte 3 8 : On Timeout 2,3

User defined EOF U8 11 0 0 - 255

Add frames trigger 4 U8 12 0 0 : disabled 1 : enabled

Add CRC 16

U8

13

0

0 : disabled 1 : enabled


Digital output mode

U8

14

0



(1): If this parameter is set to User defined, the end of frame (EOF) character taken into account is the one specified by the “User defined EOF” parameter. If it is set to “on timeout”, the reception timeout taken into account is the “EOF timeout”.

(2): If the parameter “EOF delimiter” is set to “on timeout”, only the frames received on the serial link will be detected on timeout. On the EtherNet/IP side, a byte has to change to trigger a new frame on the serial line. For this purpose, it can be usefull to add a trigger byte in the OUTPUT assembly. The PLC will change the value of the trigger byte, each time it wants a frame to be sent.

(3): If the parameter “EOF delimiter” is set to “length in 1st byte” or to “on timeout”, the padding value is 0x00.

(4): The trigger byte can be used as a counter:

o If this parameter is activated, the 1st byte of the EtherNet/IP outputs is used as a trigger that is incremented each time data is available and is to be sent. The usable data starts from the 2nd byte. If there is no counter, the frame is re-copied from the 1st byte as soon as a change in the EtherNet/IP outputs is detected.

o If the trigger byte is activated, the 1st byte of the EtherNet/IP inputs is incremented each time a new frame is received on the serial link. The usable data is copied after this counter. If there is trigger byte, the received frame is copied from the 1st byte.


The “Interframe Silence” parameter in the TRANSPARENT mode:

The “Interframe silence” parameter allows a waiting period between a reception and the next transmission of a frame:

Figure 18: Interframe Silence in TRANSPARENT mode

If no frame is detected, Molex EtherNet/IP to serial gateway sends frames on the serial link without waiting for an inter-frame time. However, if a frame is detected on RX, Molex gateway waits for the inter-frame time before sending the next frame.


4.6.1. Setting TRANSPARENT mode in a configuration tool




... and then fill the 16 bytes with the configuration data.


4.7. Input Only connection

Input Only connection can be used to get the status information of the equipment.


Input Only

Assembly instance Conf 0x6B (101)

OT 0xC6 (198)

TO 0x67 (101)

Default size 0 0 1

Min size 0 0 1

Max size 0 0 50

path 20 04 24 6B 2C C6 2C 67



2 bytes 48 bytes

Scen0 Scen1 … Scen47 Scen48

15 8 7 0

« General status » « Scenario status »


This assembly can be used to get the status information about the device. The status information is built with:

- 2 bytes for « General status »: Used for all the configurations, to report general status. - 48 bytes for « Scenario status »: Used only in MODBUS master mode, each scenario uses

one byte to report its status.

General status bit field:

Error Bit Mode

Bit 0 = MODBUS Master: Reception error MODBUS MASTER

Bit 1 = MODBUS Master: Timeout MODBUS MASTER

Bit 2 = MODBUS Master: Exception frame MODBUS MASTER

Bit 3 = Transparent: Reception error TRANSPARENT

Bit 4 = Transparent: Transmission error TRANSPARENT

Bit 5 = Slave: General error SLAVE

Bit 6 to 15 = Reserved

Scenario status value:

Error Code

0 = No error

1 = CRC error

2 = Length error

3 = Exception "Illegal function" received

4 = Exception "Illegal address" received

5 = Exception "Illegal data" received

6 = Exception "Slave failure" received

7 = Exception "Acknowledge" received

8 = Exception "Slave busy" received

9 = Exception "memory parity error" received

10 = Exception "Gateway path unavailable" received

11 = Exception "Gateway target failed" received

12 = Timeout

13 = Not supported MODBUS address


14 = Not supported MODBUS function

15 = Not supported MODBUS data

16 = Other error


The output assembly of an Input Only connection is a heartbeat and therefore doesn’t embed any data.


The configuration assembly doesn’t embed any data.


4.8. Listen Only connection

Listen Only is used to consume the EO input assembly that is already exchanged with another scanner.


Listen Only

Assembly instance Conf 0x6B (101)

OT 0xC6 (198)

TO 0x65 (101)

Default size 0 0 1

Min size 0 0 1

Max size 0 0 500

path 20 04 24 6B 2C C6 2C 65


The input assembly has the same format as defined in corresponding EO connection (Please see sections 4.4.3, 4.5.3 and 4.6.3)


The output assembly of an Input Only connection is a heartbeat and therefore doesn’t contain any data.


The configuration assembly doesn’t contain any data.


5. DIAGNOSTIC

5.1. Diagnostic on the UDP 5628810 port

Information about the configuration, parameterisation and status of the functioning of Molex gateway are sent via the UDP protocol. This information can be viewed using a tool that displays ASCII data received on the UDP 56288 port.

The properties of the UDP link are:

- Port: 5628810 (DBE016)

- Destination IP address: Broadcast on the IP network of Molex gateway (example: 192.168.10.255 on a 192.168.10.0 network).

When switched on, the following header is sent:

When the gateway connects to Ethernet/IP, the physical parameters of the MODBUS link are displayed. The configured exchanges are then displayed. In the following example, 1 exchange on MODBUS Master is configured:

Figure 19: Configuration and state of the gateway is sent on UDP

Read 010 registers with MODBUS 03 function on the slave 01 with a cycle time of 100 ms.


If the MODBUS link is correctly established, no additional message is displayed.

Otherwise, a message reports the encountered error. In the following example, the MODBUS slave mentioned in the configuration of scenario 1 no longer responds:

In the above case, the TIMEOUT error message is repeated twice since the “Retries if Timeout” parameter of the Molex gateway hardware configuration was previously set to 2. When the third error occurs, an additional message is displayed, stating that a fault has occurred.

When the gateway is disconnected from Ethernet/IP, the following message is displayed.

The Molex gateway generates status that can be checked to detect communication or equipment problem.

5.2. Status of Identity Object, with explicit messaging

See Identity description in 3.2.1

5.3. Status in implicit messaging

The implicit messaging is started with a Forward_Open service. The answer of the adapter to this request can return some problems (for example, if the size of an assembly is too small).

If the Forward_Open service is successful, then the equipment goes to data exchange. In the input data, whatever is the connection type, a status field gives information on the equipment. (Please see sections 4.4.3, 4.5.3 and 4.6.3)

5.4. Indicators

Indicators on the front panel show errors on serial link or EtherNet/IP connection. For more details see chapter 2.2.

5.5. Using web server for diagnostic

Diagnostic information and statistics are available on the web server. For more details see chapters 8.5 (SNMP), 8.6 (Ethernet), 0 (EtherNet/IP), 0 (MODBUS).


5.6. Digital output diagnostic


6. DIGITAL INPUTS/OUTPUTS

6.1. Digital output (DO)

There are 2 possible uses of the Digital output:

- Diagnostic output, controlled by the gateway

- Digital output, controlled from the EtherNet/IP scanner

This setting is done through the configuration assembly of the EO connection.

Diagnostic output

If the “Digital Output Mode” parameter is set to one of the following values, the relay contact is activated when a default is detected.

• On EtherNet/IP failure,

• On Serial-link failure,

• EtherNet/IP or Serial-link failure,

In the “Disabled” mode, the relay is not used if there is a fault.

In the “On EtherNet/IP failure” mode, the relay will be closed if communication with the EtherNet/IP scanner is lost or if a timeout is detected (ETH indicator lit).

In the “On Serial-link failure” mode, the relay will be closed if a fault is detected (SERIAL indicator blinking) on the serial link (e.g. Timeout of the MODBUS slave, CRC error, MODBUS function not supported by the slave, etc.)

In the “On EtherNet/IP or Serial-link failure” mode, the relay will be closed if communication with the scanner is lost or when an error is detected on the serial link.

Digital output

In the “Set by EtherNet/IP output assembly” mode, the relay will be closed if the Digital output byte of the OUTPUT Assembly is different from 0.



6.2. Digital input (DI)

The “Digital Input” is readable into the “Digital Input” byte of the Input assembly of the EO connection.

If 24 V is applied on the DI, the digital value in the Input byte is 1.

If 0 V is applied on the DI, the digital value in the Input byte is 0.

This byte exists on each INPUT assembly (MASTER, SLAVE and TRANSPARENT mode).


7. IP ADDRESS CONFIGURATION

The IP address of the Molex Gateway may be set using:

- the DCP protocol via an online access to the gateway,

- the DIP switches located on the front side of the Molex gateway,

- EtherNet/IP (0xF5 object),

- DHCP protocol,

- Web server.

7.1. Configuration via the DCP protocol

Primary Setup Tool is a Siemens freeware that can be downloaded from

https://support.industry.siemens.com

With the Primary Setup Tool, choose the right NIC card on the Settings menu.

Then, browse the network with the browse icon. When the gateway is found, you can check the IP address configuration.

The selected station is identified by its MAC address, if it doesn’t have an IP address yet.

If more than one equipment appears, select the correct one, change its IP address with the fields on the right of the window. Then, click on the download icon to apply the settings.

https://support.industry.siemens.com/


7.2. Applying a default IP address using a DIP switch

It is possible to apply a default IP address to the Molex EtherNet/IP to serial gateway.

IP address Sub-net mask

192.168.10.20 255.255.255.0

Turn off the gateway and set the DIP switch 1 to ON position (to the right):

Figure 20: Position of DIP switch 1 to configure the default IP address

Comment: the position of the other switches (no. 2, 3 and 4) is not relevant.

Power on the gateway and ensure that the green “ON” indicator is steady and that the “RUN” indicator is blinking. The IP address of the gateway is 192.168.10.20. The web browser can be started for further configuration or diagnostic.

7.3. IP configuration via WEB server

Configure the gateway with the default IP address (192.168.10.20).

Configure the IP parameters of the equipment used (PC, tablet, Smartphone, etc.) to connect to the WEB server using:

The IP address The Sub-net mask

Between 192.168.10.1 and 192.168.10.254

255.255.255.0

Important: make sure the IP address is not used by another equipment.

Open a web browser and type IP address in the address bar:

DIP 1 = ON

Power OFF


Enter login and password. The default account configuration is described on chapter 8.2.

Configure a new IP address using the Web server.

In the web browser, type the new expected IP address, subnet mask, and default gateway. Then, click on Apply button.

7.4. Configuration via the EtherNet/IP 0xF5 TCP/IP object

Using explicit messaging, it is possible to change IP parameters.

The example below shows a MOLEX® EtherNet/IP free software named “EIP_Tools”. It allows sending an explicit message request to set attribute 5 “Interface configuration” of object 0x0F5 “TCP/IP”.

First it reads all information using the “Get_Attribute_All”, then it is possible to modify fields named “IP Address”, “Network Mask”, “Gateway Address” with the new IP configuration to apply.

Finally use the “Set_Attribute” button to send an explicit request to force the new IP parameters into the Adapter.



8. WEB SERVER

8.1. Configuration web page

To access the WEB server, a valid IP address must be configured. To configure this address, refer to chapter 7 “IP address configuration”. The homepage is the following one:

The web server of Molex EtherNet/IP to serial gateway is composed of the following sections accessible through the left menu:

- System information: contains general information about the device

- Network settings: provides MAC and IP addresses

- SNMP information: shows a summary of the MIB-2 system group information

- Ethernet statistics: provides statistics of the 2-ports switch embedded in Molex EtherNet/IP to serial gateway

- MODBUS: provides statistics of MODBUS operating over serial link

- File system: provides a way to explore, download or upload files on the Molex gateway file system

- Firmware upload: used to upload a new firmware on the Molex gateway

- Reboot: used to reboot the Molex gateway

- Passwords: used to change passwords for “user” and “admin” accounts

- Logout: used to switch between accounts

- Custom: link to the customized web pages (to be implemented by end user)

Online monitoring of the Molex gateway is available on the right of the web page and provides:

- Status of the fault ETH and SERIAL LEDs

- Status of the RUN LED

- Status of Tx/Rx LEDs on serial line

- DIP switch position for applying the default IP configuration

- DIP switch position for choosing between the RS232 or RS485


The data in the displayed webpage are updated every 1 s. It is possible to disable this (enabled by default) by toggling the refresh button:

8.2. Account management on the web server

The web server is secured with an authentication system that is based on a login and a password:

Login Default password

admin admin

user user

It is possible to change between the accounts by using the “Logout” menu that will pop-up the authentication window.

Logins cannot be altered, but the associated password can, through the “Passwords” menu.

The user account has the following restrictions:

- Unable to load files on the file system using the explorer from the “File system” menu

- Unable to load a new firmware on the Molex gateway in the “Firmware upload” menu

- Unable to reboot Molex gateway using in “Reboot” menu

- Unable to modify passwords in the “Passwords” menu

Enabled Disabled


8.3. System information menu

This page shows the main information of the Molex gateway Ethernet/IP to serial link:

Name Description

Device Name Name of the Ethernet/IP station set to Molex gateway (empty string if no name set or after a “DCP reset” request)

Manufacturer Name of the manufacturer of Molex gateway: MOLEX

Order ID Product reference of Molex gateway: DRL-EIP-SRM

Serial Number Serial number of Molex gateway (specific for each product)

Firmware version

Defines the specific firmware version embedded in Molex gateway

Hardware version

Defines the specific hardware version of Molex gateway

Build Build date of the firmware embedded in Molex gateway

Up Time Time spent since the last power up of Molex gateway

Two links are present under the table of information that are used to download:

- The EDS file needed in the engineering tool to import Molex EtherNet/IP to serial gateway into the configuration

- The user manual

Both documents are stored in archive files (.zip) and could be found on the file system.


8.4. Network settings menu

This menu provides the MAC and IP addresses currently used by Molex EtherNet/IP to serial gateway:

Name Description

MAC Address MAC address of the Molex gateway

IP Address Current IP address

Subnetwork Mask Current subnetwork mask

Gateway Address Current router address

8.5. SNMP information menu

This menu provides a resume of the MIB-2 “system” group:

Name Description

SysName Name of the equipment: Direct-Link EtherNet/IP

SysDescription Description of the system: Molex EtherNet/IP to serial gateway

SysContact Contact to use for information request.

SysLocation Information on the location of the device in the system.

SysUptime Time spent since the last reboot of Molex EtherNet/IP to serial gateway


8.6. Ethernet statistics menu

This menu shows the statistics contained in the 2-ports switch embedded in Molex gateway. Statistics are shown in tables and a button is used to reset all the statistics:


« Port configuration and status »

Name Description

Port Port number (port1 or port 2)

Name Identifier used for each Ethernet port (send to neighbors through LLDP)

Speed Speed configured on the port (10/100Mbits)

Enabled State of the port (up = enabled / down= disabled)

State State of the Ethernet link (up= link OK / down = no link)

Last change Value of the SysUptime when the last event occurred on the port (link up/down)

« Traffic types »

Name Description

Rx Unicast Number of received unicast frames

Rx Multicast Number of received multicast frames

Rx Broadcast Number of received broadcast frames

Tx Unicast Number of transmitted unicast frames

Tx Multicast Number of transmitted multicast frames

Tx Broadcast Number of transmitted broadcast frames

« Frame sizes »

Name Description

64 Number of frames received/transmitted with 64 bytes length

65-127 Number of frames received/transmitted with from 65 to 127 bytes length





« Traffic »

Name Description

IN octets Number of received bytes

OUT octets Number of sent bytes

IN frames Number of received frames

OUT frames Number of sent frames

Bandwidth use Percentage of bandwidth currently used

Max use Maximum percentage of bandwidth used


« Frames errors »

Name Description

CRC Number of frames having CRC/FCS (Frame Checksum) errors

Undersize Number of frames having a length smaller than 64 bytes

Oversize Number of frames having a length greater than 1536 bytes

IN frames discarded

Number of received frames discarded due to insufficient resources in the switch (buffer full)

OUT frames discarded

Number of frames to send discarded due to insufficient resources in the switch (buffer full)

Collisions Number of collision detected


8.7. EtherNet/IP ADAPTER menu

This window indicates the global status of the adapter. The status can be ONLINE (connected to a scanner) or OFFLINE (not connected to a scanner).

Below are the 2 standard indicators of an EtherNet/IP adapter. They can be green, or red, steady or blinking, as explained below:

Network status indicator

Indicator State Summary Description

Flashing green No connections An IP address is configured, but no CIP connection is established, and an exclusive owner connection has not timed out.

Steady green Connected An IP address is configured, at least one CIP connection (any transport class) is established, and an exclusive owner connection has not timed out.

Flashing red Connection timeout An IP address is configured and an exclusive owner connection has timed out.

Module status indicator

Indicator State Summary Description

Flashing green Standby If the device has not been configured. No configuration assembly active.

Steady green Device operational If the device is operating correctly.

Flashing red Major recoverable fault

IP lost (DHCP lease)


8.8. MODBUS menu

This menu provides statistics according to the current MODBUS mode selected.

When the MODBUS Master mode is selected, the following information is shown:

When the MODBUS Slave mode is selected, the following information is shown:

The page is empty when the Transparent mode is selected.

These statistics are updated every second by the web server.


It is possible to reset the value of the statistics by clicking on the “Reset” button.

8.9. File system menu

The file system page provides access to the files and directories of Molex gateway by the way of an embedded file browser on the web page.

The current directory will always begin with “/FLASH0” which is the root directory of Molex gateway.

The total space and remaining space of the flash file system are shown in kilo-bytes.

File size is indicated in the “size” column while directories are identified by the “DIRECTORY” indicator in the “size” column.

Left-clicking on a directory will allow to browse it. Downloading a file is possible by right-clicking on it and selecting “save link as…”

It is possible to upload file into the file system by using the “upload file” below the file browser.

The current browsed directory will be used as destination. When the upload begins, a new line will show the progress of the operation:

When the file upload is finished, the line will automatically disappears and the file browser will refresh.

Only the “admin” account is able to upload files on the file system.

Note: file browsing and uploading are not compatible with Internet Explorer. Theses functionalities have been tested and validated with Google Chrome (v36.0.1985.143) and Mozilla Firefox (v31.0) web browsers.


8.10. Firmware upload menu

This page will allow the “admin” account to upload a firmware to update Molex gateway.

The firmware file shall be named “image.bin”. Other file names will be rejected.

It is recommended to stop the EtherNet/IP communication during the operation.

The button “Upload firmware” will pop-up a dialog box used to select the file to load.

The firmware upload will start and the page will show the progress of the file upload:

After the file is uploaded (100%), the validation stage will begin. This operation may take 1 to 2 minutes and is indicated with the loading icon:

When validation is finished, a reboot is needed to complete the firmware upload. A dialog box wills pop-up to inform the user that the reboot is required:

Molex gateway will reboot and apply the new firmware. This operation may take 1 minute during which the power supply shall not be disconnected.

During this operation, the front panel indicators will remain off until Molex gateway restarts. The operation is completed when the RUN indicator blinks at 1Hz.

To ensure the firmware has been applied properly, it is possible to check the version in the “System information” web page.

Note: file browsing and uploading are not compatible with Internet Explorer. Theses functionalities have been tested and validated with Google Chrome (v36.0.1985.143) and Mozilla Firefox (v31.0) web browsers.

Uploading file Progress

Validating file


8.11. Reboot menu

This page allows restarting Molex EtherNet/IP to serial gateway. Only the “admin” account is able to perform this operation.

Clicking on the reboot button will pop up a dialog box to confirm the reboot:

8.12. Passwords menu

Passwords for “admin” or “user” account can be modified through this page:

The “admin” password is required to modify any account password (“current admin password” text box)/

The account to modify can be chosen in the drop-down list named “choose a login”.

It is required to enter the new password twice, for validity check.

The new password will be applied after clicking on the “save” button if:


- The current admin password is correct

- The new password has been entered correctly into the two fields

8.13. Logout menu

Changing current user account can be done by clicking on the “Logout” menu, which will pop-up the authentication window:


9. FTP SERVER

An FTP server allows access to the file system. The connection uses the following parameters:

- IP address: Current IP address of Molex EtherNet/IP to serial gateway

- Port: 21

- Login: admin

- Password: admin (by default)

- FTP mode: passive

- The option for displaying hidden files is activated (-a).

All operations for files and directories are accessible (reading/writing files, creating/deleting directories).

An example of a connection with the FileZilla software (http://filezilla-project.org):

- first, select the option “Show hidden files”:

- then, enter the connection information. An example is given below:

Local file system Remote file system

http://filezilla-project.org/


10. SNMP AGENT

The Molex EtherNet/IP to serial gateway uses SNMP V1 protocol as SNMP agent with the MIB 2 standard database reachable on UDP port 161.

Through SNMP, a supervisor (Network Management Station) can read data from the Molex gateway MIB 2 database and retrieve:

- General device information (system)

- Time spent since last powering up (system)

- Port states, link status and configured speed (interface)

- Received/send Ethernet frames statistics (interface)

- Received/send IP packets statistics (IP)

Figure 71: MIB 2 tree

Agent SNMP

V1

MIB2

MOLEX Gateway

NMS

Read/Write SNMP

Figure 21: Network Management Station (NMS) principle with SNMP


SNMP V1 uses a community key provided with request to authorize their execution. Molex gateway uses the default values:

- Public community key for read operations: “public”

- Private community key for read/write operations: “private”

The Molex gateway also provides LLDP MIB. This MIB holds topology data sent by nearby devices.

The data can be read by an SNMP client (in this example using “HiVision”) that would be able to show the topology of the network being discovered.

LLDP MIB data could also be directly read by a MIB browser:


11. APPENDICES


11.1. APPENDIX A: MODBUS frame formats

The MODBUS functions 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x0F, 0x10 are supported by Molex gateway. The format of each function is detailed with the help of an example for the ASCII and RTU mode. The CRC (MODBUS RTU) or LRC (MODBUS ASCII) bytes are mandatory.

MODBUS RTU uses 8 bit data coding. MODBUS ASCII uses 7 bit data coding.

Function 1 (0x01)

This function enables reading the status of several Booleans (coils or discrete outputs). The broadcast is not supported. The number of Booleans to be read simultaneously with Molex gateway is limited to 2000 (16 bits x 125 registers).

Format of the request:

Field name Value to be transmitted

Bytes sent if RTU

Bytes sent if ASCII

character Character ASCII

code

Frame header - - ":" 0x3A

Slave address 0x39 0x39 "39" 0x33, 0x39

Function code 0x01 0x01 "01" 0x30, 0x31

1st high-order bit address 0x00 0x00 "00" 0x30, 0x30

1st low-order bit address 0x22 0x22 "22" 0x32, 0x32

Number of high-order bits 0x00 0x00 "00" 0x30, 0x30

Number of low-order bits 0x12 0x12 "12" 0x31, 0x32

Error check (CRC/LRC) - 0x18

0xB5 "92" 0x39, 0x32

End of frame - - CR LF 0xD, 0xA

Format of the response:

Field name Value to

be received

Bytes received

if RTU

Bytes received if ASCII

character Character

ASCII code




Number of data bytes 0x03 0x03 "03" 0x30, 0x33

Status of the bits 0x29 to 0x22 0x59 0x59 "59" 0x35, 0x39

Status of the bits 0x32 to 0x2A

0xC4 0xC4 "C4" 0x43, 0x34


Error check (CRC/LRC) - 0x7B

0xE5 "A5" 0x41, 0x35



Function 2 (0x02)

This function enables reading the status of several Booleans (Discrete inputs). The broadcast is not supported. The number of Booleans to be read simultaneously with Molex gateway is limited to 2000 (16 bits x 125 registers).



Bytes sent if RTU

Bytes sent if ASCII

character Character

ASCII code






Number of high-order bits 0x00 0x00 "00" 0x30, 0x30

Number of low-order bits 0x12 0x12 "12" 0x31, 0x32

Error check (CRC/LRC) - 0x5C

0xB5 "91" 0x39, 0x31



Field name Value to

be received

Bytes received

if RTU


character Character

ASCII code






Status of the bits 0x32 to 0x2A

0xC4 0xC4 "C4" 0x43, 0x34


Error check (CRC/LRC) - 0x3F

0xE5 "A4" 0x41, 0x34



Function 3 (0x03)

This function enables reading the MODBUS registers (Holding Registers). The broadcast is not supported. The number of registers to be read simultaneously is limited to 125.



Bytes sent if RTU

Bytes sent if ASCII


code




1st high-order register address

0x00 0x00 "00" 0x30, 0x30

1st low-order register address

0x22 0x22 "22" 0x32, 0x32

Number of high-order registers

0x00 0x00 "00" 0x30, 0x30

Number of low-order registers

0x02 0x02 "02" 0x30, 0x32


0xB9 "A0" 0x41, 0x30



Field name Value to

be received

Bytes received

if RTU



code





1st high-order register value 0x68 0x68 "68" 0x36, 0x38

1st low-order register value 0x31 0x31 "31" 0x36, 0x38

2nd high-order register value 0x47 0x47 "47" 0x36, 0x38


Error check (CRC/LRC) - 0xFD

0x95 "87" 0x38, 0x37



Function 4 (0x04)

This function enables reading the MODBUS registers (Input Registers). The broadcast is not supported. The number of registers to be read simultaneously is limited to 125.



Bytes sent if RTU

Bytes sent if ASCII


code




1st high-order register address

0x00 0x00 "00" 0x30, 0x30

1st low-order register address

0x22 0x22 "22" 0x32, 0x32

Number of high-order registers

0x00 0x00 "00" 0x30, 0x30

Number of low-order registers

0x03 0x03 "03" 0x30, 0x33


0xB9 "9E" 0x39, 0x45



Field name

Value to be

received

Bytes received

if RTU



code





1st high-order register value 0x68 0x68 "68" 0x36, 0x38

1st low-order register value 0x31 0x31 "31" 0x33, 0x31





Error check (CRC/LRC) - 0xE2

0xD9 "84" 0x38, 0x34



Function 5 (0x05)

This function enables writing a Boolean (coil) to ON or OFF. Broadcast is supported. The Boolean may take either the value 0x0000 (OFF) or the value 0xFF00 (ON).



Bytes sent if RTU

Bytes sent if ASCII


code




High-order register address 0x00 0x00 "00" 0x30, 0x30

Low-order register address 0x22 0x22 "22" 0x32, 0x32

High-order register value 0xFF 0xFF "FF" 0x46, 0x46

Low-order register value 0x00 0x00 "00" 0x30, 0x30


0x30 "D9" 0x44, 0x39




Bytes sent if RTU

Bytes sent if ASCII


code






High-order register value 0xFF 0xFF "FF" 0x46, 0x46



0x30 "D9" 0x44, 0x39



Function 6 (0x06)

This function enables writing a MODBUS register (Holding Registers). Broadcast is supported.



Bytes sent if RTU

Bytes sent if ASCII

character Character ASCII code






High-order register value 0x00 0x00 "00" 0x30, 0x30


Error check (CRC/LRC) - 0xAD

0x46 "49" 0x34, 0x39




Bytes sent if RTU

Bytes sent if ASCII

character Character ASCII code




High-order register address 0x0

0x00 0x00 "00" 0x30, 0x30

Low-order register address 0x0

0x22 0x22 "22" 0x32, 0x32

High-order register value 0x00 0x00 "00" 0x30, 0x30


Error check (CRC/LRC) - 0xAD 0x46

"49" 0x34, 0x39



Function 15 (0x0F)

This function enables writing several Booleans (coils or discrete outputs) to ON or OFF. Broadcast is supported. The number of Booleans to be written simultaneously with Molex gateway is limited to 1968 (16 bits x 123 registers).



Bytes sent if RTU

Bytes sent if ASCII

character Character

ASCII code



Function code 0x0F 0x0F "0F" 0x30, 0x46



Number of low-order bits to be written

0x00 0x00 "00" 0x30, 0x30

Number of high-order bits to be written

0x12 0x12 "12" 0x31, 0x32


Value of the bits 0x29 to 0x22 0x2B 0x2B "2B" 0x32, 0x42

Value of the bits 0x32 to 0x2A 0x06 0x06 "06" 0x30, 0x36

Value of the bits 0x34 to 0x33 0x03 0x03 "03" 0x30, 0x33


0xCB "4D" 0x34, 0x44




Bytes sent if RTU

Bytes sent if ASCII

character Character

ASCII code



Function code 0x0F 0x0F "0F" 0x30, 0x46



Number of low-order bits to be written

0x00 0x00 "00" 0x30, 0x30

Number of high-order bits to be written

0x12 0x12 "12" 0x31, 0x32


0x74 "84" 0x38, 0x34



Function 16 (0x10)

This function enables writing MODBUS registers (Holding Registers). Broadcast is supported. The number of registers to be written simultaneously is limited to 123.



Bytes sent if RTU

Bytes sent if ASCII


code




1st high-order register address 0x00 0x00 "00" 0x30, 0x30

1st low-order register address 0x22 0x22 "22" 0x32, 0x32

Number of high-order registers 0x00 0x00 "00" 0x30, 0x30

Number of low-order registers 0x02 0x02 "02" 0x30, 0x32


High-order register value 0x52 0x00 0x00 "00" 0x30, 0x30

Low-order register value 0x52 0x56 0x56 "56" 0x35, 0x36

High-order register value 0x53 0x00 0x00 "00" 0x30, 0x30

Low-order register value 0x53 0x57 0x57 "57" 0x35, 0x37


0xE0 "E2" 0x45, 0x32



Field name Value to be

received

Bytes received

if RTU



code




1st high-order register address 0x00 0x00 "00" 0x30, 0x30

1st low-order register address 0x22 0x22 "22" 0x32, 0x32

Number of high-order registers 0x00 0x00 "00" 0x30, 0x30

Number of low-order registers 0x02 0x02 "02" 0x30, 0x32

Error check (CRC/LRC) - 0xE5, 0x7A

"93" 0x39, 0x33



MODBUS Exception frames

An exception frame is generated by the MODBUS slave if the master requests it to carry out an unauthorised action. Molex gateway manages the following exceptions:

Exception code

Name Description

01 ILLEGAL

FUNCTION

This exception is returned by the slave if the master uses a function that the slave does not recognise. Molex gateway MODBUS only manages the functions 1, 2, 3, 4, 5, 6, 7, 15, 16 and 23.

02 ILLEGAL DATA

ADDRESS

This exception is returned if the master attempts to access an inaccessible MODBUS register. For example, Molex gateway is configured such that it has 10 registers in read-only mode (address 0 to 9) and 10 registers in write-only mode (address 0 to 9). An error is thus reported if the master tries to access register 20.

This error also occurs if, for example, with a function 3, the master tries to read 20 registers from the register 1 (address 0).

03 ILLEGAL DATA

VALUE

This exception is returned if the master attempts to write data that the slave cannot accept. For example, with the function 5, the only possible data is 0x0000 and 0xFF00. In all other cases, the exception function 3 is sent back.

06 SLAVE BUSY This exception is returned by a MODBUS slave when it is

already managing a process and is thus unable to respond to the request.

0A GATEWAY

PATH UNAVAILABLE

In the slave mode, this exception is sent in response to any MODBUS request when the EtherNet/IP communication has not been established.

Format of the exception frame:

This exception frame is an example of a frame received in response to a function 6. The exception occurred because the master attempted to access an unauthorised register.

The MODBUS function codes are 7-bit (codes 1 to 127). The 8th bit is reserved and serves to report an exception frame when it is set to 1.

Field name

Value to be

received

Bytes received

if RTU


character Character

ASCII code



Function code + 0x80

0x86 0x86 "86" 0x38, 0x36

Exception code 0x02 0x02 "02" 0x30, 0x32

Error check (CRC/LRC)

- 0x31

0x62 "75" 0x37, 0x35



11.2. APPENDIX B: MIB2

OID MIB2 = 1.3.6.1.2.1

“System” section: IOD system = 1.3.6.1.2.1.1

OID Name Access Description

1.3.6.1.2.1.1.1 sysDescr R description of the device

1.3.6.1.2.1.1.2 sysObjectID R identity of the agent

1.3.6.1.2.1.1.3 sysUpTime R Time elapsed since the agent was initiated (hundred

seconds)

1.3.6.1.2.1.1.4 sysContact R name of the person to be contacted

1.3.6.1.2.1.1.5 sysName R name of the device

1.3.6.1.2.1.1.6 sysLocation R physical location of the device

1.3.6.1.2.1.1.7 sysServices R services offered by the device

“Interface” section: IOD interface = 1.3.6.1.2.1.2


1.3.6.1.2.1.2.2.1.12 ifInNUcastPkts R number of broadcast and multicast packets received

1.3.6.1.2.1.2.2.1.13 ifInDiscards R Number of packets rejected because of resource

limitations.

1.3.6.1.2.1.2.2.1.14 ifInErrors R Number of packets rejected because of format error.

1.3.6.1.2.1.2.2.1.15 ifInUnkownProtos R number of packets intended for other protocols

1.3.6.1.2.1.2.2.1.16 ifOutOctets R total number of bytes transmitted by the interface

1.3.6.1.2.1.2.2.1.17 ifOutUcatsPckts R number of unicast packets transmitted

1.3.6.1.2.1.2.2.1.18 ifOutNUcastPkts R number of broadcast and multicast packets

transmitted

1.3.6.1.2.1.2.2.1.19 ifOutDiscards R number of packets rejected because of resource

limitations.

1.3.6.1.2.1.2.2.1.20 ifOutErrors R number of packets rejected because of format error.

1.3.6.1.2.1.2.2.1.21 ifOutQlen R size of the output waiting queue packet size

1.3.6.1.2.1.2.2.1.22 ifSpecific R pointer towards a specific MIB


“At” / “Address Translation” section: OID at = 1.3.6.1.2.1. 3 OBSOLETE “Ip” / “Internet Protocol” section: OID 1.3.6.1.2.1.4


1.3.6.1.2.1.4.1 ipForwarding R the node acts as a gateway or host

1.3.6.1.2.1.4.2 ipDefaultTTL R Default TTL (Time To Live) on the IP packets

1.3.6.1.2.1.4.3 ipInReceives R total number of IP packets received (including errors)

1.3.6.1.2.1.4.4 ipInHdrErrors R Number of datagrams ignored because of format error.

1.3.6.1.2.1.4.5 ipInAddrErrors R Number of datagrams ignored because of improper destination.

1.3.6.1.2.1.4.6 ipInForwDatagrams R number of packets retransmitted

1.3.6.1.2.1.4.7 ipInUnkownProtos R number of datagrams intended for another protocol

1.3.6.1.2.1.4.8 ipInDiscards R number of packets ignored because of resource limitations.

1.3.6.1.2.1.4.9 ipInDelivers R number of packets taken into consideration

1.3.6.1.2.1.4.10 ipOutRequest R total number of IP packets transmitted (including errors)

1.3.6.1.2.1.4.11 ipOutNoRoutes R Number of packets not transmitted because of a routing problem.

1.3.6.1.2.1.4.12 ipReasmTimeout R time out value for the waiting queue for datagram reassembly

1.3.6.1.2.1.4.13 ipReasmReqds R number of fragments received that require reassembly

1.3.6.1.2.1.4.14 ipReasmOKs R number of datagrams correctly reassembled

1.3.6.1.2.1.4.15 ipReasmFails R Number of reassembly errors

1.3.6.1.2.1.4.16 ipFragOKs R number of datagrams correctly fragmented

1.3.6.1.2.1.4.17 ipFragFails R number of datagrams requiring fragmentation even though the IP flags do not indicate so

1.3.6.1.2.1.4.18 ipFragCreates R number of fragments created

“Icmp” / “Internet Control Message Protocol” section: OID 1.3.6.1.2.1.5


1.3.6.1.2.1.5.1 icmpInMsgs R Number of ICMP messages received

1.3.6.1.2.1.5.2 icmpInErrors R Number of ICMP messages received with an error (improper ICMP checksum, improper length)

1.3.6.1.2.1.5.3 icmpInDestUnreachs R ICMP destination number unreachable

1.3.6.1.2.1.5.4 icmpInTimeExcds R Number of SNMP messages received with time exceeded

1.3.6.1.2.1.5.5 icmpInParmProbs R Number of ICMP messages received with parameter problems

1.3.6.1.2.1.5.6 icmpInSrcQuenchs R Number of ICMP messages received from a powered-off source

1.3.6.1.2.1.5.7 icmpInRedirects R Number of redirected ICMP messages received

1.3.6.1.2.1.5.8 icmpInEchos R Number of ICMP request messages received

1.3.6.1.2.1.5.9 icmpInEchoReps R Number of ICMP messages received with an echo


1.3.6.1.2.1.5.10 icmpInTimestamps R Number of ICMP TimeStamp messages received

1.3.6.1.2.1.5.11 icmpInTimestampReps R Number of SNMP response messages received

1.3.6.1.2.1.5.12 icmpInAddrMasks R Number of ICMP address mask request messages received

1.3.6.1.2.1.5.13 icmpInAddrMaskReps R Number of ICMP address mask response messages received

1.3.6.1.2.1.5.14 icmpOutMsgs R Number of ICMP messages ready to be sent

1.3.6.1.2.1.5.15 icmpOutErrors R Number of ICMP messages not sent because of errors. For example, no resources available in the reception buffer.

1.3.6.1.2.1.5.16 icmpOutDestUnreachs R Number of ICMP messages sent to unreachable destinations.

1.3.6.1.2.1.5.17 icmpOutTimeExcds R Number of ICMP messages with exceeded outtime

1.3.6.1.2.1.5.18 icmpOutParmProbs R Number of ICMP messages with problematic sending parameters

1.3.6.1.2.1.5.19 icmpOutSrcQuenchs R Number of ICMP messages sent to a powered-off source

1.3.6.1.2.1.5.20 icmpOutRedirects R Number of redirected ICMP messages sent

1.3.6.1.2.1.5.21 icmpOutEchos R Number of ICMP Echo messages sent

1.3.6.1.2.1.5.22 icmpOutEchoReps R Number of Echo responses sent

1.3.6.1.2.1.5.23 icmpOutTimestamps R Number of ICMP TimeStamp messages sent

1.3.6.1.2.1.5.24 icmpOutTimestampReps R Number of ICMP TimeStamp responses sent

1.3.6.1.2.1.5.25 icmpOutAddrMasks R Number of ICMP mask request messages sent

1.3.6.1.2.1.5.26 icmpOutAddrMaskReps R Number of ICMP mask response messages sent

“Tcp” / “Transmission Control Protocol” section: OID 1.3.6.1.2.1.6


1.3.6.1.2.1.6.6 tcpPassiveOpens R number of passive connections opened

1.3.6.1.2.1.6.7 tcpAttemptFails R number of failed connection attempts

1.3.6.1.2.1.6.8 tcpEstabResets R number of connection resets

1.3.6.1.2.1.6.9 tcpCurrEstab R number of ongoing connections

1.3.6.1.2.1.6.10 tcpInSegs R number of segments received

1.3.6.1.2.1.6.11 tcpOutSegs R number of segments transmitted

1.3.6.1.2.1.6.12 tcpRetransSegs R number of segments re-transmitted

1.3.6.1.2.1.6.13 TcpConnTable R A table containing specific information

pertaining to connections through TCP connections

1.3.6.1.2.1.6.13.1 TcpConnEntry R Information regarding a particular TCP

connection

1.3.6.1.2.1.6.13.1.1 tcpConnState R status of the connection

1.3.6.1.2.1.6.13.1.2 tcpConnLocalAddress R local IP address

1.3.6.1.2.1.6.13.1.3 tcpConnLocalPort R local port number

1.3.6.1.2.1.6.13.1.4 tcpConnRemoteAddress R Remote IP address

1.3.6.1.2.1.6.13.1.5 tcpConnRemotePort R remote port number

1.3.6.1.2.1.6.14 tcpInErrs R number of segments ignored because of

format error.


1.3.6.1.2.1.6.15 tcpOutRsts R number of resets generated

1.3.6.1.2.1.6.15 tcpPassiveOpens R number of resets generated

“Udp” / “User Datagram Protocol” section: OID 1.3.6.1.2.1.7


1.3.6.1.2.1.7.1 udpInDatagrams R number of datagrams transmitted

1.3.6.1.2.1.7.2 udpNoPorts R number of datagrams intended for an

unknown protocol

1.3.6.1.2.1.7.3 udpInErrors R Number of datagrams ignored because of

format error.

1.3.6.1.2.1.7.4 udpOutDatagrams R number of datagrams transmitted

“Snmp” / “Simple Network Management Protocol” section: OID 1.3.6.1.2.1.11


1.3.6.1.2.1.10.1 snmpInPkts R Total number of PDUs received from the

lower layer

1.3.6.1.2.1.10.2 snmpOutPkts R Total number of PDUs sent to the lower

layer

1.3.6.1.2.1.10.3 snmpBadVersions R Total number of PDUs received which

have a different version number than the local number

1.3.6.1.2.1.10.4 snmpBadCommunityNames R Total number of PDUs with an unknown

community name

1.3.6.1.2.1.10.5 snmpBadCommunityUses R Total number of PDUs that cannot be

processed within the context of this community

1.3.6.1.2.1.10.6 snmpInASNParseErrs R Total number of errors at the time of

interpretation of an ASN.1 object

1.3.6.1.2.1.10.8 snmpInTooBigs R Number of PDUs received with ErrorStatus

'too big' (the response does not fit in an UDP message)

1.3.6.1.2.1.10.9 snmpInNoSuchNames R Number of PDUs received with ErrorStatus

‘noSuchNames' (name unknown)

1.3.6.1.2.1.10.10 snmpInBadValues R Number of PDUs received with ErrorStatus

‘badValue’

1.3.6.1.2.1.10.11 snmpInReadOnlys R Number of PDUs received with ErrorStatus

‘readOnly’

1.3.6.1.2.1.10.12 snmpInGenErrs R Number of PDUs received with ErrorStatus

‘genErr’

1.3.6.1.2.1.10.13 snmpInTotalReqVars R Number of objects of the MIB which pertain

to a Get-Request or Get-Next request

1.3.6.1.2.1.10.14 snmpInTotalSetVars R Number of objects of the MIB which pertain

to a Set-Request

1.3.6.1.2.1.10.15 snmpInGetRequests R Total number of PDU Get-Requests

processed by the SNMP protocol

1.3.6.1.2.1.10.16 snmpInGetNexts R Total number of PDU Get-Nexts processed

by the SNMP protocol

1.3.6.1.2.1.10.17 snmpInSetRequests R Total number of PDU Set-Requests


1.3.6.1.2.1.10.18 snmpInGetResponses R Total number of PDU Get-Responses


1.3.6.1.2.1.10.19 snmpInTraps R Total number of PDU Traps processed by

the SNMP protocol


1.3.6.1.2.1.10.20 snmpOutTooBigs

R Total number of SNMP PDUs which were generated by the SNPM protocol entity and for which the value of the ‘ErrorStatus’ field is “tooBig”

1.3.6.1.2.1.10.21 snmpOutNoSuchNames

R Total number of SNMP PDUs which were generated by the SNPM protocol entity and for which the value of the ‘ErrorStatus’ field is “NoSuchName”

1.3.6.1.2.1.10.22 snmpOutBadValues

R Total number of SNMP PDUs which were generated by the SNPM protocol entity and for which the value of the ‘ErrorStatus’ field is “badValue”

1.3.6.1.2.1.10.24 snmpOutGenErrs

R Total number of SNMP PDUs which were generated by the SNPM protocol entity and for which the value of the ‘ErrorStatus’ field is “genErr”

1.3.6.1.2.1.10.25 snmpOutGetRequests R Total number of PDUs of the Get-Request

type which were generated by the SNPM protocol entity

1.3.6.1.2.1.10.26 snmpOutGetNexts R Total number of PDUs of the Get-Next type

which were generated by the SNPM protocol entity

1.3.6.1.2.1.10.27 snmpOutSetRequests R Total number of PDUs of the Set-Request

type which were generated by the SNPM protocol entity

1.3.6.1.2.1.10.28 snmpOutGetResponses R Total number of PDUs of the Get-

Responses type which were generated by the SNPM protocol entity

1.3.6.1.2.1.10.29 snmpOutTraps R Total number of PDUs of the Trap type

which were generated by the SNPM protocol entity

1.3.6.1.2.1.10.30 snmpEnableAuthTraps R Indication about the configuration of the

SNMP agent pertaining to the generation of the Authentication Trap

Documents

Molex EtherNet/IP to serial gateway to Modbus Serial Gateway User... · Molex EtherNet/IP to serial gateway 6 1. PROPERTIES 1.1. General properties Ethernet Link Bandwidth 10/100