Profibus Network

8/12/2019 Profibus Network

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SIMATIC NETWORK


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SIMATIC NETWORK


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Profibus Introduction

Profibus was created in Germany in March, 1996Profibus was embeded in European in standard EN50170


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Profibus Introduction

There are three kind of profibus: Profibus FMS, DP and PAFMS : Fieldbus Message SpecificationDP : Decentralized PeripheryPA : Proccess Automation


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Profibus DP


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Profibus DP Introduction

Distributed automation systems is used increasingly

in manufacturing and proccess automation.The complex control task is divided into smaller

subtasks with distributed control system.

Smaller, clearer programs are easy for programmingand trouble shooting.Parallel processing by distributed control system

reduce load and reaction times on cpuStructure of large systems alway have diagnostic and

logging functions.


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Characteristics of Profibus DP

Open standard based on EN50170

Up to 244 byte of input and output data per messageUp to 126 stations may connect to the busUp to 32 stations per bus segment.

Fasted fieldbus standard to date with data rates up to12Mps: Transmission rates depend on type of cable anlength

To 93.75Kbps : 1000 m187.5 Kbps : 800 m500Kbps : 400 m1 to 1.5Mps : 200 m

3 to 12Mps : 100 m


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Characteristics of Profibus DPTransmission Medium:

RS 485 for electrical networks on shielded, twisted paircable.

OLM(Optical link Module)Wireless

Physical characteristic of the rs 485 Transmission Techniques


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Passive and Active components of RS-485 network

Passive components


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Passive and Active components of RS-485 network

Passive components : Fastconnect bus connector


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Passive components of RS-485 network Fastconnect bus connector


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Connecting Cable


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Active components of RS-485 network Repeater

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Master Slave Cyclic Data Exchange

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Master Slave Data Exchange

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Communication between S7300 and S7200 usingProfibus DP network

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Communication between S7300 and S7200 usingProfibus DP network

FeaturesMaster must be S7300 or S7400.CPU type: CPU31x- 2DP or CP41x 2 DP.EM277 is used to communicate between S7200 and

S7300 or S7400.Total nodes of network are 99

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CPs 31x-2DP

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CPs 41x-2DP

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Communication Module EM277

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Communication Module EM277

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Data Exchange between Master and Slave

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Features

Master Master uses I and Q memory area to exchange data with

Slave Number of bytes and start address are identified in

hardware configureSlave

Slave uses V memory area to exchange data with Master Start address of V equal to offset addressInput data of slave is next to output data

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Data Exchange between Master and two SlaveS7300 or

s7400

NoticeI and Q memory areas in Master must be differentOffsets of V in two CPUs can be the same or different

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Communication between S7300 and S7300 usingProfibus DP Networ

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Features

MasterMaster uses I and Q memory area to exchange data with

Slave Number of bytes and start address are identified in

hardware configureSlave

Slave uses I and Q memory area to exchange data withMaster

Number of bytes and start address are identified inhardware configure

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Data Exchange between Master and two Slaves

Notice:I and Q memory areas in Master must be differentI and Q memory areas in slaves can be the same or different

EEEFET200 Di ib d I/O D i


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ET200 Distributed I/O Devices

ET200 consists of an interface module(IM 153-x) and I/Omodules of the S7300.ET200 is used whenever I/Os are distances from the controller ET200 is ideal solution for following systems:

The CPU is located at the central locationI/Os operate locally on a distributed system.Profibus DP with high data trasmission speed ensures the

cpu and I/Os communicate smoothly.

EEEFC i i b S7300 d ET200 i


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Communication between S7300 and ET200 usingProfibus DP Network

EEEFC ti g d tti g dd f ET200


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Connecting and setting address for ET200

EEEFM d l E i i ET200


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Module Expansion using ET200

I/O modules, SM, FM, CP can be insert on ET200.Expansion modules address on ET200 are as modules addressas in the S7300 CPU

EEEFET200 M d l ( IM 153 1)


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ET200 Module ( IM 153-1)

EEEFD t E h b t M t d ET200


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Data Exchange between Master and ET200

Master and ET200 use the same I and Q memory area toexchange data

EEEFP fib DP E i t 1


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Communicating between S7300 and S7200 using Profibus

DP network.Connect s7300 and s7200 via profibus(Disconnect powersupply, setting EM277 address, connect s7300 and EM277 via

profibus cable, turn on terminating resistors)

Configure hardware in Simatic Step 7 (Configure s7300station, open hardware, insert profibus network, insert a slaveEM277)

Write and download program into S7300

Write and download program into S7200Following Steps:

Profibus DP Experiment 1

EEEFC t th fib t k


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Connect the profibus network

Notice: Setting address for M277

EEEFC fig th h d


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Configure the hardwareOpen the hardware configuration, add the cpu s7300 andmodules

Notice: Hardware configuration and real hardware must be matched, otherwise thwill fault

EEEFConfigure the profibus connection : Right click on DP/Properties/New/enter


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Configure the profibus connection : Right click on DP/Properties/New/enterappropriate name

EEEF A new profibus is created without slave


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p

EEEFAdd the slave to profibus network: Select bus/right click/Insert/Addition field


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Add the slave to profibus network: Select bus/right click/Insert/Addition fielddevice/PLC/EM277/ set address for Slave

EEEFAdd the slave to profibus network: Select bus/right click/Insert/Addition field


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Add the slave to profibus network: Select bus/right click/Insert/Addition fielddevice/PLC/EM277/ set address for Slave

EEEF A Slave has address 3 is created in the profibus network


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p

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Select number of bytes of data to exchange between master and slaveClick on Slave/at slot1/Insert Object/select number of in/out bytes and startaddress.

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Select number of bytes of data to exchange data between master andslave: Click on Slave/at slot1/Insert Object/select number of in/out bytes andstart address.

EEEFDefine V memory area in the S7200 by setting


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Define V memory area in the S7200 by settingOffset.


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EEEFWrite a program in s7300 and download to the


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Write a program in s7300 and download to thes7300 cpu

EEEFWrite a program in S7200 and download to the


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Write a program in S7200 and download to thes7200 cpu

EEEFMonitor the project


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Create a variable in step 7

Insert input/output variable tableInput can be update via variable controlOutputs can be set via variable control

Monitor the project

EEEFProfibus DP Experiments 2


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Communicating between S7400 and ET200 via ProfibusDP network.

Connect s7400 and ET200 via profibus(Disconnect powersupply, setting ET200 address, connect s7400 and ET200 via

profibus cable, turn on terminating resistors)

Configure hardware in Simatic Step 7 (Configure s7400station, open hardware, insert profibus network, insert a slaveET200)

Write and download program into S7400

Following Steps:

Profibus DP Experiments 2

EEEFConnect profibus network


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Connect profibus network

Notice: Setting address for ET200

EEEFConfigure the hardware


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Configure the hardwareOpen the hardware configuration, add the cpu s7400 andmodules


EEEFConfigure the profibus connection : Right click on DP/Properties/New/enter


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appropriate name

EEEFAdd ET200 to the profibus network: Select bus/right click/Insert/DV0 slave/


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p gset address for Slave

EEEFAdd I/O modules to the ET200 : Select ET200,start at slot 3/Insert appropriate


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, pp pmodules

Notice: I and Q address areas are used to program in the CPU



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Insert input/output variable table of moduleswhich added in ET200

Input can be update via variable control

Outputs can be set via variable control

Monitor the project

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EEEFProfibus DP Experiment 3


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Communicating between S7300 and S7400 via Profibus DPnetwork.

Connect s7400 and s7300 via profibus(Disconnect powersupply, connect s7400 and s7300 via profibus cable, turn onterminating resistors)

Configure hardware in Simatic Step 7 (Configure s7400 ands7300 station, configure profibus network)Write and download program into S7400Write and download program into S7300

Following Steps:

p

EEEFConfigure the hardware for s7400 station


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gOpen the hardware configuration, add the cpu s7400 andappropriate modules




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gSetup operation mode fo the CPU: Right click on DP/Properties/ Operation mode/Check DP master




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gOpen the hardware configuration, add the cpu s7300 andmodules


EEEFConfigure the hardware for CPU S7300


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gSetup operation mode fo the CPU: Right click on DP/Properties/ Operation mode/Check DP slave

EEEFConfigure the profibus connection


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g pOpen the hardware configuration, add profibus network/enter appropriate name and select slave CPU 31x

EEEFConfigure the profibus connection


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g pOpen the hardware configuration, add profibus network/enter appropriate name and select slave CPU 31x/ click

coupe


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EEEFConfigure the I/O data


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Open the hardware configuration, double click on slave/configuration/ click new and enter I/O data for master and

slave

Notice: select address, length, unit to define i/o data



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Open the hardware configuration, double click on slave/configuration/ click new and enter I/O data for master and

slave

Notice: select address, length, unit to define i/o data



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Result of configure I/O data as below

Notice: Number of bytes and start address can be changed



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Result of configure I/O data as below

EEEFPROGRAM FOR MASTER AND SLAVE


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Program in master

Program in slave



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Insert input/output variable tableInput can be update via variable controlOutputs can be set via variable control

Documents

Profibus Network