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S7-400, M7-400 Programmable Controllers

This Supplement contains additional information about the products. It is a separate component andshould be considered more up-to-date than the information in the manuals and catalogs if uncertaintiesarise.

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Siemens AGBereich Automatisierungs- und AntriebstechnikGeschaeftsgebiet Industrie-AutomatisierungssystemeOestliche Rheinbrueckenstr. 50 76181 Karlsruhe

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S7-400, M7-400Supplement to the Documentation

3S7-400, M7-400 Programmable ControllersC79000-Z7076-C417-06

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Contents

1 Connecting the Central Rack (CR) and the Expansion Rack (ER) 4. . . . . . . . . . . . . .

2 Special Features of STEP 7 Programming with CPUs 41x 5. . . . . . . . . . . . . . . . . . . .

3 Cycle and Reaction Times of the S7-400 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Special Features of Communication 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 Behavior of S7-400 Signal Modules After Parameter Assignment 13. . . . . . . . . . . . .

6 PROFIBUS DP Master Interface IM 467 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 PS 407 10A (0KA00) Power Supply Module 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8 PS 407 10A (0KA01) and PS 407 10A R Power Supply Modules 17. . . . . . . . . . . . . . .

9 SM 421 Digital Input Module;DI 32xDC 24 V 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10 Points to Note when Installing a Synchronization Submodule 17. . . . . . . . . . . . . . . .

11 SM 431 Analog Input Module;AI 16 x 13 Bit (6ES7431-0HH00-0AB0) 19. . . . . . . . . . .

The information in this supplement regarding the properties of CPUs relates to thefollowing CPUs with their specified release levels.

CPU Order Number From Release Level

CPU 412-1 6ES7 412-1XF02-0AB0 02

CPU 413-1 6ES7 413-1XG02-0AB0 01

CPU 413-2 DP 6ES7 413-2XG02-0AB0 01

CPU 414-1 6ES7 414-1XG02-0AB0 02

CPU 414-2 DP, 128 Kbytes 6ES7 414-2XG02-0AB0 02

CPU 414-2 DP, 384 Kbytes 6ES7 414-2XJ01-0AB0 02

CPU 416-1 6ES7 416-1XJ02-0AB0 02

CPU 416-2 DP, 0.8 Mbytes 6ES7 416-2XK01-0AB0 02

CPU 416-2 DP, 1.6 Mbytes 6ES7 416-2XL01-0AB0 02

CPU 417-4 6ES7 417-4XL00-0AB0 01

CPU 417-H 6ES7 417-4HL00-0AB0 01

S7-400, M7-400 Supplement to the Documentation

S7-400, M7-400 Programmable ControllersC79000-Z7076-C417-064

1 Connecting the Central Rack (CR) and the Expansion Rack (ER)

EXTF LED on the IM 461-x

On an expansion rack (ER) connected to a central rack (CR) via an IM 460-3/IM461-3 (remote link), the EXTF LED on the receiving IM 461-3 lights up when theCR is switched off.

ON an ER connected to a CR via an IM 460-0/IM 461-0 or IM 460-1/IM 461-1 (locallink), the EXTF LED on the receive IM does not light up when the CR is switchedoff.

Interference Suppression Measures

To conform to the requirements of the EC Directive 89/336/EEC “ElectromagneticCompatibility” (CE mark), you should take the following measures when connectingcentral racks and expansion racks:

� Remote connection of expansion rack to a central rack with mounting rack URvia IM 460-0/IM 461-0:

Attach a ferrule (split ferrite core) close to each connector on the IM cable

A suitable split ferrite core is that of the type SFC 10 by Thora, Winn 6,D-91567 Herrieden, Germany Tel. +49 9825 4755 or a comparable product.

Figure 1-1 shows an IM cable with a ferrule (split ferrite core).

Ferrule (Split Ferrite Core)

Figure 1-1 IM Cable with Ferrule (Split Ferrite Core)



2 Special Features of STEP 7 Programming with CPUs 41x

Addressing Modules (with CPUs 412 to 416)

The start address of modules and components in either a central configuration or ina distributed configuration must be a value that can be divided by 4 with noremainder (0, 4, 8, 12...).

Starting a Timer

If there is an instruction for starting a timer programmed in the user program, theremust be a BCD number at this point in the program sequence in accumulator 1.This also applies if the timer is not started.

Setting a Counter

If there is an instruction for setting a counter programmed in the user program,there must be a BCD number at this point in the program sequence inaccumulator 1. This also applies if the counter is not set.

SLD and SRD Instructions (with CPUs 412 to 416)

If parameters 64, 96, 128, 160, 192, or, 224 are transferred to the SRD or SLDinstructions in accumulator 2-L-L with the CPUs 41x, status bit CC1 is set.

RND- and RND + Instructions (with CPUs 412 to 416)

If a value in the range 0 to 0.25 is present as a floating-point number, theinstruction RND+ supplies the result “0” instead of “1.”If a value in the range 0 to -0.25 is present as a floating-point number, theinstruction RND- supplies the result “0” instead of “-1.”

Writing Bit Instructions (with CPUs 412 to 416)

In the case of a fault, writing bit instructions report a read error instead of a writeerror. This applies to the following:

� Area length errors (entry in the diagnostic buffer made with event IDW#16#2522 instead of W#16#2523)

� Area errors (entry in the diagnostic buffer made with event ID W#16#2524instead of W#16#2525)

� I/O access errors (entry in the diagnostic buffer made with event ID W#16#2944instead of W#16#2945)

I/O Access via Word and Double Word Commands (CPU 417-4 and CPU 417-4H)

With I/O access via word or double word commands, if the first byte or the first oneto three bytes exist but the rest of the addressed area does not, accumulator “0” isloaded.



Access to D P Slaves (with CPUs 412 to 416)

A DP station is connected to an S7-400 via an external DP interface moduleCP 443-5.

If you use word access to access a DP slave with one byte of user data(instructions L PIW, T PQW), the I/O access error organization block (OB122) is notcalled. After executing the instruction L PIW, accumulator 1 contains B#16#00instead of the non-existent peripheral byte.

If you use double word access to access a DP slave with three bytes of user data(instructions L PID, T PQD), the I/O access error organization block (OB122) is notcalled. After executing the instruction L PID, accumulator 1 contains B#16#00instead of the non-existent peripheral byte.

Single Step (with CPUs 412 to 416)

With the STEP 7 function “single step mode,” the CPU requires more time than theexecution time for the instruction. As a result of the scan cycle time monitoring, it ispossible that the CPU may go into STOP mode because the cycle time wasexceeded. You can avoid this by calling the SFC43 “RE_TRIGR” in the time errororganization block (OB80).

Breakpoints (with CPUs 412 to 416)

If you have set a breakpoint at a jump instruction or a block end instruction and theCPU has reached this instruction, neither the function “execute next statement” northe function “execute call” can be executed. Instead the error message “D063:Resource error: the trigger event is occupied” is displayed.

If you have set a breakpoint at a UC or CC instruction and the CPU has reachedthis instruction, the function “execute call” cannot be executed. Instead the errormessage “D063: Resource error: the trigger event is occupied” is displayed.

Remedy: Delete the current breakpoint or move it to the previous command line.

SFC 11 SYNC/FREEZE

SFC11 cannot be called in the startup OBs (OB100, OB101). A call in these OBs isrejected with the RET_VAL identifier 0x80C8. In the other priority classes, you canuse SFC11 without restrictions. You can use SFC11 only for the plug-in DPmodules (CP 443-5 extended, IM 467). SFC11 cannot be used for the integratedDP interfaces of the CPU 413-2, 412-2, and 416-2.

ET 200M stations assigned to sync/freeze groups with STEP 7 during hardwareconfiguration must not contain FM or CP modules.



Deviation Precision for Time Synchronization

The deviation precision during time synchronization is:

At the communication bus 10 ms

At the MPI 200 ms

Accuracy of the Integrated Real-Time Clock

The accuracy of the integrated real-time clock is:

During operation 8.6 s/d

With battery backup 1.7 s/d

SFC 90 Not Released (CPU 417-4H)

SFC 90 has not yet been released for use with CPU 417-4H.

FM 353/354 Not Distributed (CPU 417-4 and CPU 417-4H)

If you use the CPU 417 as the DP master, you must not use FM 353 and 354 in adistributed configuration within an ET 200M. This applies to:

� FM 353, up to and including 6ES7 353-1AH01-0AE0, firmware version 3.3

� FM 354, up to and including 6ES7 354-1AH01-0AE0, firmware version 3.3

No Cross-Module Addressing in the DP Address Range at the Integrated DP Interface(CPU 417-4 and CPU 417-4H)

This type of “cross-module”addressing must not beprogrammed at inputsor at outputs!

CPU 417

PROFIBUS DP

DP slavee.g. ET 200 M

DI DI

EB0 EB1 to 3

Do not access these moduleswith L PID 0 or L PIW 0!

Example:



3 Cycle and Reaction Times of the S7-400

Introduction

The times and measured values listed below can be used in conjunction with theinformation provided in the Module Specifications Reference Manual to calculatethe cycle and reaction times.

Test Arrangement

CPU 417-4/CPU417-4H with DI 16 (421-7DH00-0AB0) and DO 32(422-1BL00-0AA0) in the central rack.

Operating System Processing Times of the CPUsSequence CPU 417-4 CPU 417-4H CPU 417-4H

Solo Redundant

Cycle control 150 – 290 �s 1)

∅ 152 �s190 – 1770 �s 2)

∅ 200 �s395 – 1865 �s 3)

∅ 445 �s

1. The update of the timer cells increases the cycle time by approximately 140 �severy 10 ms.

2. The update of the timer cells increases the cycle time by approximately 420 �severy 10 ms.The double master detection increases the cycle time by approximately 1070 �severy 200 ms.

3. The update of the timer cells increases the cycle time by approximately byapproximately 460 �s every 10 ms.



Updating the Process Image of the CPUs

Parts CPU 417-4 CPU 417-4H CPU 417-4HSolo Redundant

K Basic load 20 �s 20 �s 20 �sA In the central rack

Read byte/word/double wordWrite byte/word/double wordwith n = 1, 2, or 4

n*1.9 �sn*1.9 �s

13+n*1.9 �s9+n*1.9 �s

48+n*1.9 �s44+n*1.9 �s

B Per byte in expansion unit withlocal linkRead byte/word/double wordWrite byte/word/double wordwith n = 1, 2, or 4

n*5 �sn*5 �s

13+n*5 �s9+n*5 �s

48+n*5 �s44+n*5 �s

C Per byte in expansion unit withremote linkRead byte/word/double wordWrite byte/word/double wordwith n = 1, 2, or 4

n*10 �sn*10 �s

13+n*10 �s9+n*10 �s

48+n*10 �s44+n*10 �s

D In DP area for integrated DPinterface Read byte/word/double wordWrite byte/word/double wordwith n = 1, 2, or 4

n*0.5 �sn*0.5 �s

13+n*0.5 �s9+n*0.5 �s

48+n*0.5 �s44+n*0.5 �s

CPU-Specific Factors

Sequence CPU 417-4 CPU 417-4H CPU 417-4H

Solo Redundant

Factor 1.02 1.03 1.14

Direct Access of the CPUs to I/O Modules

Access Type CPU 417-4 CPU 417-4H CPU417-4H

Solo Redundant

Read byteRead wordRead double wordWrite byteWrite wordWrite double word

2.4 �s3.8 �s7.6 �s2.4 �s3.9 �s7.8 �s

43 �s46 �s50 �s38 �s41 �s45 �s

79 �s82 �s86 �s73 �s76 �s80 �s



Increasing the Cycle Time by Nestin g Interrupts

CPU Hard-ware

Interrupt

Diagnosticinterrupt

Time-of-Day

Interrupt

Time-DelayInterrupt

CyclicInterrupt

Programming/Access Error

417-4 370 �s 420 �s 350 �s 260 �s 260 �s 130 �s / 140 �s

417-4 H Solo 390 �s 450 �s 310 �s 270 �s 255 �s 140 �s / 170 �s

417-4 H Red 705 �s 785 �s 560 �s 530 �s 530 �s 175 �s / 240 �s

CPU Asynchronous error (OB 85 while updating the process image)

417-4 270 �s

417-4H Solo 260 �s

417-4H Redundant 310 �s

Hardware Interrupt Reaction Times of the CPUs

CPU min. max.

417-4 255 �s 435 �s

417-4H Solo 270 �s 530 �s

417-4H Redundant 375 �s 690 �s

Diagnostic Interrupt Reaction Times of the CPUs

CPU min. max.

417-4 310 �s 490 �s

417-4H Solo 325 �s 645 �s

417-4H Redundant 415 �s 780 �s

Reproducibility of Time-Delay Interrupts and Cyclic Interrupts of the CPUs

CPU Reproducibility

Time-Delay Interrupt Cyclic Interrupt

417-4 –770 �s / +330 �s –40 �s / +40 �s

417-4H Solo –750 �s / +400 �s –850 �s / +850 �s

417-4H Redundant –500 �s / +800 �s –700 �s / +700 �s



4 Special Features of Communication

Number of Operator Stations

This specifies how many operator stations you can log on to the CPU, for examplefor process control messages.

CPU OS Stations

CPU 412-1 4

CPU 413-1, CPU 413-2 4

CPU 414-1, CPU 414-2 4

CPU 416-1, CPU 416-2 8

CPU 417-4, CPU 417-4H 8

Communication from PG/OP to Module without MPI

If one of the programming devices or operator panels connected to a multipointinterface (MPI) communicates with an S7-400 module which does not have an MPIconnection (for example, SINEC CPs, FM 456 etc.), this module can be reachedvia the CPU to whose MPI the programming device or operator panel is connected.In this case, the CPU simply acts as an intermediary for the transfer. This type ofconnection between a programming device or operator panel and a module onlycommunicating via the communication bus occupies two connection resources inthe CPU.

CPU CP or FM

MPIC bus

PG or OP

Two connection resourcesoccupied in the CPU

S7-400station

One connectionresource occupied

One connectionresource occupied

Figure 1-2 Communication between Programming Device/Operator Panel and a Modulewithout MPI

Maximum Number of Connections via MPI

When configuring the connections of a CPU 416 via MPI, remember to include thePG connection in the maximum number of possible connections.



PG AccessA CPU exchanges data with other systems using communication mechanisms, forexample with other programmable controllers, with operator interface stations (OP,OS) or with programming devices (see Figure 1-3).

CPU

SIMATIC NET

MPI

PG OS PLC

PG OS SlavePG OS PLC

DP network

Figure 1-3 Data Exchange

Process communication, including communication services for data exchangebetween programmable controllers (PLC – PLC) and between programmablecontrollers and operator interface stations (PLC – OS/OP), has priority in CPUsover communication between programming devices and CPUs.The CPUs have different characteristics. One of these characteristics is theircommunication performance. If the communication resources of a CPU areoccupied completely by process communication, this can severely hamper accessto the CPU from the programming device.This can often be avoided by a slight reduction in process communication. Thefollowing table shows several examples of this. The values relate to a user datalength of 200 bytes.

CommunicationM h i

CPU 412, CPU 413 CPU 414, CPU 416Mechanism Max. No. of

FramesMax. No. ofFrames withReliable PG

Access

Max. No. ofFrames

Maximum No. ofFrames withReliable PG

Access

PLC–PLC communicationwith USEND/URCV

140 / s 130 / s 150 / s 140 / s

PLC–PLC communicationwith BSEND/BRCV

100 / s 90 / s 100 / s 90 / s

PLC–PLC communicationwith AGSEND/RCV *

70 / s 65 / s 70 / s 65 / s

PLC-OP communication(single jobs)

65 / s 60 / s 80 / s 60 / s

* It is advisable to set a minimum scan cycle time of 10 ms or to locate thecalls in a cyclic interrupt priority class.

The number of frames per line reflects the performance of the CPU.



5 Behavior of S7-400 Signal Modules After Parameter Assignment

Parameter Assignment of S7-400 Signal Modules

S7-400 signal modules can be assigned parameters by the operating system of theCPU or by calling an SFC in your program.

Parameters are assigned by the operating system of the CPU in the followingcases:

� At startup (both complete restart and hot restart)

� After plugging a module into a configured slot

� After the return of a rack or station when using distributed I/Os

S7-400 Input Modules

After assigning parameters to an S7-400 input module, the data read by yourprogram from the module are not immediately valid. You can only evaluate thesewhen bit 2 (“operating status”) in byte 2 of diagnostic data record 0 has the value 0(“RUN”).

For this reason, all S7-400 input modules which can be assigned parametersprovide diagnostic data record 0. You can read out diagnostic data record 0 withSFC51 “RDSYSST” (input parameter SZL_ID W#16#00B1) or with SFC59“RD_REC”.

S7-400 Output Modules

After assigning parameters to an S7-400 output module, it is possible that theoutput data you have written to the module is not transferred immediately to theoutputs.

From the time that bit 2 (“operating status”) in byte 2 of diagnostic data record 0 isset to the value 0 (“RUN”), the module transfers the output data to the outputterminals.

For this reason, diagnostic data record 0 is provided by all S7-400 output moduleswhich can be assigned parameters. You can read out diagnostic data record 0 withSFC51 “RDSYSST” (input parameter SZL_ID W#16#00B1) or with SFC59“RD_REC.”



6 PROFIBUS DP Master Interface IM 467

Order Number

6ES7 467-5GJ00-0AB0

Use

PROFIBUS DP, standardized according to EN 50170, allows fast communication inthe field area between programmable logic controllers, PCs, and field devices.Field devices include distributed I/O devices (ET 200), drives, valve islands,switching devices, and many others.

The IM 467 interface module is intended for use in an S7-400 programmable logiccontrol system. It enables you to connect an S7-400 to PROFIBUS DP.

Design

� Configuration according to the rules for an S7-400

� 9-pin sub-D female connector for attachment to PROFIBUS DP

� Can be operated without a fan

� A maximum of four IM 467 modules can be used in the central rack. No slotrules apply

� A total of four IM 467 and CP 443-5 Extended modules can be used together

� Various transmission rates between 9.6 Kbps and 12 Mbps can be set in thesoftware

� Configuration and programming are possible via PROFIBUS DP althoughPROFIBUS parameters must not be changed !



PROFIBUS DP interface9-pin sub-D

LED displays

Mode switch

Figure 1-4 Configuration of the IM 467

Communication Services

The IM 467 provides you with two possible means of communication:

� PROFIBUS-DP

The IM 467 is a PROFIBUS DP master which conforms to EN 50 170. It isconfigured completely with STEP 7. In principle, its behavior is the same as thatof the integrated PROFIBUS DP interfaces on the CPU modules (fordifferences, refer to the technical data of the IM 467).

No function calls are necessary in the STEP 7 user program for DPcommunication.

� S7 functions

S7 functions ensure optimum, simple communication in a SIMATIC S7/M7/C7automation system. For IM 467, the following S7 functions are used:

– Programming device functions via PROFIBUS DP

– Operator monitoring and control functions via PROFIBUS DP

Communication requires no further configuration on the IM 467.

The S7 functions can be used alone or parallel to the PROFIBUS DP protocol. Ifthey are used parallel to DP communication, this will affect the PROFIBUS DPround-trip time.



ConfigurationThe IM 467 is configured with STEP 7. The configuration data is also retainedduring power down without a submodule being necessary. With the S7 functions,all IM 467 modules atached to the network and all CPUs connected via theSIMATIC S7 400 backplane bus can be programmed/configured remotely.

Technical DataThe technical data of the IM 467 are listed below.

Dimensions and Weight

Dimensions WxHxD

Weight

25 x 290 x 210 mm

(1.0 x 11.4 x 8.3 in.)

700 g (28 oz)

Ambient Conditions

Ambient temperature

� Operation

� Transport andstorage

Operating altitude

0 to 60 °C–40 to +70 °C

3000 m above sealevel

PROFIBUS DP

� Standard

� Transmission rate

� Transmissionmethod

� Ports

PROFIBUS, EN 50 170

9.6 Kbps to 12 Mbps,can be set to variousrates

RS 485

9-pin Sub-D female

Conditions for Use

For use with

Power supply

Current consumption

� from 5 VDC

Addressing volume

Number ofconnectable I/Os(slaves)

Number ofconnections for S7functions for PGs andoperator interfacedevicesData volume per slaveConsistencyConfiguration software

SIMATIC S7-400,max. 4 IM 467 in thecentral rack5 VDC via thebackplane bus

1.2 Amax. 4 Kbytes forinputs and 4 Kbytesfor outputs

96

32 + 1 diagnosticconnection

max. 240 bytesmax. 128 bytesSTEP 7

Differences compared with the DP interfaceintegrated in the CPU

� Different system status list IDs for systemdiagnostics

� Extended SFC operating times (in somecases)

� Additional return codes for SFC14 andSFC15

Maximum Cable Lengths with PROFIBUS DP

Transmission rate in Kbps 9.6 19.2 93.75 187.5 500 1500 3000 6000 12000

Max. length of a bussegment in m

1000 1000 1000 1000 400 200 100 100 100

Max number of bussegments 1)

10 10 10 10 10 10 10 10 10

Max. length in m 10 000 10 000 10 000 10 000 4 000 2 000 1 000 1 000 1 000

1) Bus segments are interconnected by an RS 485 repeater



7 PS 407 10A (0KA00) Power Supply Module

The PS 407 10A (0KA00) power supply module cannot be used redundantly. At thepresent time only the PS 407 10A R power supply module with the order number6ES7 407 0KR00 0AA0 can be used redundantly.

8 PS 407 10A (0KA01) and PS 407 10A R Power Supply Modules

The power supply modules have an inrush current limitation in accordance withNAMUR. When you switch off the supply voltage or disconnect the power supplymodule from the mains, you no longer have to wait approximately 20 secondsbefore switching the supply voltage on again. The inrush current limitation of thepower supply module is always guaranteed to be fully effective.

9 SM 421 Digital Input Module;DI 32xDC 24 V

Order Number

6ES7 421-1BL00-0AA0

Extended Function from Release Level 03

The lower limit of the nominal input range for the signal “0” has been extendedfrom -3 V to -30 V.

This means that the nominal input voltage for signal “0” is –30 V to 5 V.

10 Points to Note when Installing a Synchronization Submodule

Issuing the Rack Number

In order to differentiate between the two part systems in an H system, the CPUsmust also be able to issue the rack number. One CPU has the rack number 0, theother CPU has the rack number 1. You set the rack numbers on thesynchronization submodule. For this purpose there is a miniature sliding switch onthe submodule with three settings. The rack number is adopted following Power Onand a manual memory reset.



Inserting and Removing the Synchronization Module with Voltag e Applied

When inserting or removing a synchronization module in a H system, you do notneed to switch off the power supply (PS). The synchronization module has asecond front cover which you must unscrew before you remove the module (themodule cannot be removed while the cover is in place). When you have unscrewedthis front cover, the synchronization module is isolated from the voltage and youcan remove it without damage. When you insert the submodule, it is onlyconnected to the voltage when you screw the front panel into place again (seefollowing figure).

Switch for setting

the rack numberAdditional front cover



11 SM 431 Analog Input Module;AI 16 x 13 Bit(6ES7431-0HH00-0AB0)

Order Number

6ES7 431-0HH00-0AB0

Characteristics

The SM 431;AI 16 x 13 Bit has the following characteristics:

� 16 inputs for current/voltage measurement

� Resolution13 bits

� Non-isolated (no isolation between bus section and analog section)

� Permissible common-mode voltage 2 VDC/VAC



Terminal Connection Diagram of the SM 431;AI 13 x 16 Bit

Voltage measurementCurrent measurement

M1+

M2–

M3–

M4–

M5–

M6–

M7–

CH0

CH1

CH2

CH3

CH4

CH5

CH6

CH7

L+

M0+M0–

M1–

M2+

M3+

M4+

M5+

M6+

M7+

M

M8–

M9–

M8+

M9+

M10–

M11–

M10+

M11+

M12–

M13–

M12+

M13+

M14–

M15–

M14+

M15+

CH8

CH9

CH10

CH11

CH12

CH13

CH14

CH15

Word 0

Word 4

Word 8

Word 12

Word 16

Word 20

Word 24

Word 28

Word 2

Word 6

Word 10

Word 14

Word 18

Word 22

Word 26

Word 30

L+

M

293031323334353637

39404142434445464748

38

123456789

10111213141516171819202122232425262728

Tr

Tr

Tr

Tr

Tr

Tr

Tr

Tr

Figure 1-5 Terminal Connection Diagram of the Analog Input Module SM 431;AI 16 x 13 Bit



Block Diagram of the SM 431;AI 13 x 16 Bit

Tr

Tr

Tr

Tr

Tr

Tr

Tr

Tr

*

*Voltage/current and M must belinked to the chassis ground of therack

Tr = Transducer

*

*

*

*

*

*

*

*

Measuring range module

ADC

Figure 1-6 Block Diagram of the SM 431 Analog Input Module;AI 16 x 13 Bit



Adapting to Different Sensors

To adapt the analog input module to different sensors, follow the steps outlinedbelow:

1. Insert the measuring range module into the module. One measuring rangemodule adapts two inputs channels to a sensor type.

2. Set the relevant measuring range for the channels of the module when you setthe module parameters.

Using the Measuring Range Modules

With the measuring range modules supplied, you can adapt two successive inputchannels or one resistance channel to one sensor type.

The following table shows the assignments of individual measuring range modulepositions to the relevant sensor types.

Position Sensor Types

A Voltage sensors; � 1 V

B Voltage sensors; 1 to 5 V, � 10 V

C Current sensors;�20 mA, 4 to 20 mA4-wire transducer with current output

D 2-wire transducer; 4 to 20 mATo apply current to these transducers, you must connect 24 Vto the front connector terminals L+ and M.

!WarningThe module can be damaged.The shunt resistance of an input channel can be destroyed if you accidentallyconnect a voltage sensor to the channel and you set the measuring range moduleto position C (current/4-wire transducer).Please make sure that the measuring range module is in the correct positionbefore you connect a sensor to the module.



ParametersThe analog input module SM 431;AI 16 x 13 Bit use the following static parameterswhich are stored in data set 0.

Table 1-1 Static Parameters of the SM 431;AI 16 x 13 Bit

Parameter Value RangeThe following settings can be made:

Measuring range deactivated (channel-by-channel)

Yes/No

Voltage measuring range (channel-by-channel) � 1 V1 to 5 V� 10 V

Current measuring range for 4-wire transducers(channel-by-channel)

4 to 20 mA� 20 mA

Current measuring range for 2-wire transducers (channel-by-channel)

4 to 20 mA

Interference frequency suppression (for thewhole module)

50 Hz Integration time 60 ms60 Hz Integration time 50 ms

The measuring range module sets two channels. For this reason, there arerestricting parameter assignment conditions for two neighboring channels (0/1),(2/3), (4/5), (6/7).

Table 1-2 Combinations of n Channels; Channel n+1 (n: 0, 2, 4...)

Measuring RangeChannel n+1

MeasuringRange Channel n

Deacti-vated

Voltage�1 V

Voltage1 to5 V

Voltage�10 V

Current4-wiretrans.*

Current2-wiretrans.*

Deactivated x x x x x x

Voltage�1 V x x

Voltage 1 to 5 V x x x

Voltage �10 V x x x

Current 4-wire trans.* x x

Current 4-wire trans.* x x

* trans. = transducer



Technical Data of the SM 431;AI 16 x 13 Bit

Dimensions, Cable Length, and Weight

Dimensions WxHxD (mm) 25x290x210

Weight approx. 500 g

Module-Specific Data

Number of inputs�For current/voltage

measurement 16

Cable length�Shielded max. 200 m

Surge-protection inaccordance withIEC1000-4-5

Externalprotectiondevice requiredin the signallines

Voltages, Currents, Potentials

Load voltageL+

�Reverse polarity protection

24 VDC onlynecessary forsupplying 2-wiretransducers

Yes

Voltage supply fortransducers�Short-circuit protected�Feed current per channel

Yestyp. 50 mA

Galvanic isolation betweenanalog section and busGalvanic isolation betweenanalog section, bus andchassis ground

No

Yes

Test voltage 500 VDC

Common-mode test voltage�Between the reference

potentials of the connectedsensor and chassis ground(input voltage = 0 V) 2 VDC, 2 VAC

Current consumption�From S7-400 bus (5 VDC)

�From load currentsupply L+

max. 100 mAtyp. 70 mA

0 to 400 mA

Power losses max. 2 W

Analog Value Generation

Measuring principle Sigma-Deltatransformer(integrating)

�Can be set for interferencefrequency f1 in Hz 60 50

Resulting in:

Integration time/conversion time/resolution (perchannel)

�Possible integration time inms 50 60

�Possible basic conversiontime in ms 55 65

�Cycle time Number ofactive channelsx basicconversion time

�Resolution in bits (incl.overrange in secondcomplement) 13 13



Interference Suppression, Error Limits

Interference voltagesuppression forf=nx(f1�1%)

(f1=interference frequency)�Common mode

interference(VCM<2Vs)

�Normal-mode interference(Peak value of interference< nominal value of the inputrange)

>86 dB

>60 dB

Cross-talk attenuationbetween the inputs�At 50/60 Hz >50 dB

Operating error limits (in theentire temperature range, re-lated to the input range)

��1 V��10 V

�1...5 V��20 mA

�4...20 mA

�0.65%�0.65%

�1.0%

�0.65%�0.65%

Basic error limit (operatingerror limit at 25 °C, related toinput range)

��1 V��10 V

�1...5 V��20 mA

�4...20 mA

�0.25%�0.25%

�0.5%�0.25%

�0.25%

Temperature error (related toinput range)� In all ranges � 0.01% /K

Linearity error (related toinput range) � 0.05%

Repetition accuracy (insettled state at 25°C, relatedto input range) � 0.1%

Code gaps Code gapsoccursystematicallyin the ranges1 to 5 V and4 to 20 mA

Status, Interrupts, Diagnostics

Interrupts�Limit value interrupts

�Diagnostic interrupts

Diagnostic functions�Fault indicators on the

modulefor internal faultsfor external faults

�Diagnostic functions

No

No

NoNo

No

Data for Selecting a Sensor

Input ranges (nominalranges)/input resistance�For voltage ranges

�For current measurement

�1V/10 M�10V/100 k�1 to 5 V/100 k

�20mA/50 �

4 to 20mA /50�

Permitted input voltage forvoltage input (destructionlimit)

max. 20 Vconstant75 V for max.1 ms(mark-spaceratio 1:20)

Permitted input current forcurrent input (destructionlimit) 40 mA constant

Connection of signal sensors�For voltage measurement

�For current measurement

�As 2-wire transducer�As 4-wire transducer

Possible

Possible

PossiblePossible


26


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ˇ ˆ˛˛˙˛ ˙ ˚ˇ ˆ˛ ˛ ˙ˆ - Siemens AG · S7-400, M7-400 Programmable Controllers ... (OB122) is not called. After executing the instruction L PIW, accumulator 1 contains