Siemens SIMATIC S7 User guide
SIMATIC
S7
S7-200 SMART
System Manual
V2.7, 08/2022
A5E03822230-AK
Preface
Product overview 1
Getting started 2
Installation 3
PLC concepts 4
Programming concepts 5
PLC device conguration 6
Web server 7
Program instructions 8
Communication 9
Libraries 10
Debugging and
troubleshooting 11
PID loops and tuning 12
Open loop motion control 13
Technical specications A
Calculating a power budget B
Error codes C
Special memory (SM) and
system symbol names D
References E
Ordering information F
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WARNING
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NOTICE
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If more than one degree of danger is present, the warning notice representing the highest degree of danger will be
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The product/system described in this documentation may be operated only by personnel qualied for the specic
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avoiding potential hazards when working with these products/systems.
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We have reviewed the contents of this publication to ensure consistency with the hardware and software described.
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publication is reviewed regularly and any necessary corrections are included in subsequent editions.
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A5E03822230-AK
Ⓟ 08/2022 Subject to change
Copyright © Siemens AG 2022.
All rights reserved
Preface
Purpose of the manual
The S7‑200 SMART series is a line of micro-programmable logic controllers (Micro PLCs) that can
control a variety of automation applications. Compact design, low cost, and a powerful
instruction set make the S7‑200 SMART a perfect solution for controlling small applications. The
wide variety of S7‑200 SMART models and the Windows-based programming tool give you the
exibility you need to solve your automation problems.
This manual provides information about installing and programming the S7‑200 SMART CPUs
and is designed for engineers, programmers, installers, and electricians who have a general
knowledge of programmable logic controllers.
Required basic knowledge
To understand this manual, it is necessary to have a general knowledge of automation and
programmable logic controllers.
Scope of the manual
This manual describes the following products:
• STEP 7‑Micro/WIN SMART V2.7
• S7‑200 SMART CPU rmware V2.7
For a complete list of the S7‑200 SMART products and article numbers described in this manual,
see Technical Specications (Page 795).
Certication, CE, UKCA labels and other standards
Refer to the Technical specications (Page 795) for more information.
Service and support
In addition to our documentation, we oer our technical expertise on the Internet on the
customer support web site (http://www.siemens.com/automation/).
Contact your Siemens distributor or sales oce for assistance in answering any technical
questions, for training, or for ordering S7 products. Because your sales representatives are
technically trained and have the most specic knowledge about your operations, process and
industry, as well as about the individual Siemens products that you are using, they can provide
the fastest and most ecient answers to any problems you might encounter.
S7-200 SMART
System Manual, V2.7, 08/2022, A5E03822230-AK 3
Preface
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Table of contents
Preface ................................................................................................................................................... 3
1 Product overview................................................................................................................................. 19
1.1 Security information .......................................................................................................... 19
1.2 Product overview............................................................................................................... 19
1.3 S7-200 SMART CPU ............................................................................................................ 20
1.4 New Features..................................................................................................................... 22
1.4.1 What's new in S7-200 SMART V2.7?.................................................................................... 22
1.4.2 What's new in S7-200 SMART V2.6?.................................................................................... 24
1.4.3 What's new in S7-200 SMART V2.5?.................................................................................... 25
1.4.4 What's new in S7-200 SMART V2.4?.................................................................................... 26
1.4.5 What's new in S7-200 SMART V2.3?.................................................................................... 27
1.5 S7-200 SMART expansion modules..................................................................................... 29
1.6 HMI devices for S7-200 SMART........................................................................................... 30
1.7 Communications options ................................................................................................... 31
1.8 Programming software ...................................................................................................... 32
2 Getting started .................................................................................................................................... 35
2.1 Connecting to the CPU....................................................................................................... 35
2.1.1 Conguring the CPU for communication............................................................................. 36
2.1.1.1 Overview........................................................................................................................... 36
2.1.1.2 Establishing the Ethernet hardware communication connection ......................................... 37
2.1.1.3 Setting up Ethernet communication with the CPU............................................................... 38
2.1.1.4 Establishing the RS485 hardware communication connection............................................. 40
2.1.1.5 Setting up RS485 communication with the CPU.................................................................. 40
2.2 Creating the sample program............................................................................................. 42
2.2.1 Network 1: Starting the timer............................................................................................. 44
2.2.2 Network 2: Turning the output on ...................................................................................... 45
2.2.3 Network 3: Resetting the timer........................................................................................... 46
2.2.4 Setting the CPU type and version for your project ............................................................... 46
2.2.5 Saving the sample project .................................................................................................. 47
2.3 Downloading the sample program ..................................................................................... 48
2.4 Changing the operating mode of the CPU........................................................................... 48
3 Installation........................................................................................................................................... 51
3.1 Guidelines for installing S7-200 SMART devices .................................................................. 51
3.2 Power budget .................................................................................................................... 53
3.3 Installation and removal procedures................................................................................... 55
3.3.1 Mounting dimensions for the S7-200 SMART devices.......................................................... 55
3.3.2 Installing and removing the CPU......................................................................................... 56
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3.3.3 Installing and removing a signal board or battery board...................................................... 59
3.3.4 Removing and reinstalling the terminal block connector ..................................................... 61
3.3.5 Installing and removing an expansion module.................................................................... 62
3.3.6 Installing and removing the expansion cable ...................................................................... 63
3.4 Wiring guidelines............................................................................................................... 64
4 PLC concepts........................................................................................................................................ 71
4.1 Execution of the control logic............................................................................................. 71
4.1.1 Reading the inputs and writing to the outputs .................................................................... 72
4.1.2 Immediately reading or writing the I/O ............................................................................... 73
4.1.3 Executing the user program ............................................................................................... 73
4.2 Accessing data................................................................................................................... 75
4.2.1 Accessing memory areas.................................................................................................... 76
4.2.2 Format for Real numbers.................................................................................................... 82
4.2.3 Format for strings .............................................................................................................. 82
4.2.4 Assigning a constant value for instructions ......................................................................... 83
4.2.5 Addressing the local and expansion I/O............................................................................... 83
4.2.6 Using pointers for indirect addressing................................................................................. 84
4.2.7 Pointer examples ............................................................................................................... 86
4.3 Saving and restoring data................................................................................................... 87
4.3.1 Downloading project components...................................................................................... 87
4.3.2 Uploading project components .......................................................................................... 89
4.3.3 Types of storage................................................................................................................. 91
4.3.4 Using a memory card......................................................................................................... 91
4.3.5 Inserting a memory card in a standard CPU ........................................................................ 94
4.3.6 Transferring your program with a memory card .................................................................. 94
4.3.7 Restoring data after power on............................................................................................ 98
4.4 Changing the operating mode of the CPU........................................................................... 99
4.5 Status LEDs........................................................................................................................ 99
5 Programming concepts...................................................................................................................... 103
5.1 Guidelines for designing a PLC system.............................................................................. 103
5.2 Elements of the user program .......................................................................................... 105
5.3 Creating your user program.............................................................................................. 107
5.3.1 STEP 7-Micro/WIN SMART compatibility ............................................................................ 107
5.3.2 Earlier versions of STEP 7-Micro/WIN projects.................................................................... 108
5.3.3 Using STEP 7-Micro/WIN SMART user interface.................................................................. 110
5.3.4 Using STEP 7-Micro/WIN SMART to create your programs .................................................. 111
5.3.5 Using wizards to help you create your control program..................................................... 112
5.3.6 Features of the LAD editor................................................................................................ 113
5.3.7 Features of the FBD editor................................................................................................ 113
5.3.8 Features of the STL editor................................................................................................. 114
5.4 Data block (DB) editor...................................................................................................... 115
5.5 Symbol table.................................................................................................................... 117
5.6 Variable table................................................................................................................... 120
5.7 PLC error reaction ............................................................................................................ 124
5.7.1 System Information ......................................................................................................... 126
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5.7.1.1 System ............................................................................................................................ 126
5.7.1.2 CPU ................................................................................................................................. 127
5.7.1.3 PROFINET device.............................................................................................................. 129
5.7.2 Event Log ........................................................................................................................ 130
5.7.3 PROFINET Alarm............................................................................................................... 130
5.7.4 Scan Rates ....................................................................................................................... 131
5.7.5 Non-fatal errors and I/O errors.......................................................................................... 131
5.7.6 Fatal errors ...................................................................................................................... 132
5.8 Program edit in RUN mode ............................................................................................... 133
5.9 Features for debugging your program .............................................................................. 135
6 PLC device conguration ................................................................................................................... 137
6.1 Conguring the operation of the PLC system .................................................................... 137
6.1.1 System block ................................................................................................................... 137
6.1.2 Conguring communication............................................................................................. 139
6.1.3 Conguring the digital inputs ........................................................................................... 141
6.1.4 Conguring the digital outputs......................................................................................... 144
6.1.5 Conguring the retentive ranges ...................................................................................... 145
6.1.6 Conguring system security ............................................................................................. 146
6.1.7 Conguring the startup options........................................................................................ 149
6.1.8 Conguring the analog inputs .......................................................................................... 151
6.1.9 Reference to the analog inputs technical specications ..................................................... 153
6.1.10 Conguring the analog outputs........................................................................................ 154
6.1.11 Reference to the analog outputs technical specications................................................... 155
6.1.12 Conguring the RTD analog inputs ................................................................................... 155
6.1.13 Conguring the TC analog inputs...................................................................................... 160
6.1.14 Conguring the RS485/RS232 CM01 communications signal board................................... 163
6.1.15 Conguring the BA01 battery signal board ....................................................................... 164
6.1.16 Clearing PLC memory....................................................................................................... 166
6.1.17 Creating a reset-to-factory-defaults memory card ............................................................. 168
6.2 High-speed I/O................................................................................................................. 169
7 Web server......................................................................................................................................... 171
7.1 Conguring the Web server with the Web server wizard.................................................... 173
7.1.1 Activating the Web server ................................................................................................ 173
7.1.2 Conguring the watch tables on the Web server ............................................................... 174
7.1.3 Conguring Web server users ........................................................................................... 176
7.2 Conguring the HTTPS certicates for the Web server with certicate management .......... 179
7.2.1 External certicate ........................................................................................................... 180
7.2.1.1 Manage the certicate authority....................................................................................... 180
7.2.1.2 Downloading the certicate by external mode .................................................................. 182
7.2.2 Downloading the certicates by Internal certicate ........................................................... 184
7.3 Downloading and installing the certicate of CA............................................................... 185
7.3.1 Get the certicate of CA ................................................................................................... 186
7.3.2 Installing the certicate for Windows................................................................................ 187
7.3.3 Installing the certicate for Mac OS .................................................................................. 188
7.3.4 Installing the certicate for mobile devices ....................................................................... 188
7.4 Accessing Web server from PC or mobile device................................................................ 188
7.5 Standard Web pages ........................................................................................................ 190
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7.5.1 Layout of web pages ........................................................................................................ 190
7.5.2 Introduction .................................................................................................................... 191
7.5.3 Start page........................................................................................................................ 192
7.5.4 Module information......................................................................................................... 193
7.5.5 Event log ......................................................................................................................... 193
7.5.6 Status chart ..................................................................................................................... 194
7.5.7 Watch table ..................................................................................................................... 194
7.5.8 Data log........................................................................................................................... 195
7.5.9 Set clock.......................................................................................................................... 196
7.6 User dened Web pages................................................................................................... 196
7.6.1 Downloading user-dened Web resource les ................................................................... 197
7.7 Web API (Application Programming Interface) .................................................................. 199
8 Program instructions ......................................................................................................................... 201
8.1 Bit logic ........................................................................................................................... 201
8.1.1 Standard inputs ............................................................................................................... 201
8.1.2 Immediate inputs............................................................................................................. 202
8.1.3 Logic stack overview ........................................................................................................ 203
8.1.4 STL logic stack instructions............................................................................................... 205
8.1.5 NOT................................................................................................................................. 207
8.1.6 Positive and negative transition detectors......................................................................... 208
8.1.7 Coils: output and output immediate instructions .............................................................. 209
8.1.8 Set, reset, set immediate, and reset immediate functions.................................................. 209
8.1.9 Set and reset dominant bistable ....................................................................................... 210
8.1.10 NOP (No operation) instruction ........................................................................................ 212
8.1.11 Bit logic input examples ................................................................................................... 212
8.1.12 Bit logic output examples................................................................................................. 214
8.2 Clock ............................................................................................................................... 215
8.2.1 Read and set real-time clock............................................................................................. 215
8.2.2 Read and set real-time clock extended.............................................................................. 218
8.3 Communication ............................................................................................................... 221
8.3.1 GET and PUT (Ethernet).................................................................................................... 221
8.3.2 Transmit and receive (Freeport on RS485/RS232).............................................................. 229
8.3.3 Get port address and set port address (PPI protocol on RS485/RS232)................................ 241
8.3.4 Get IP address and set IP address (Ethernet)...................................................................... 242
8.3.5 Open user communication............................................................................................... 244
8.3.5.1 OUC instructions.............................................................................................................. 244
8.3.5.2 OUC instruction error codes ............................................................................................. 255
8.4 Compare.......................................................................................................................... 256
8.4.1 Compare number values .................................................................................................. 256
8.4.2 Compare character strings................................................................................................ 259
8.5 Convert ........................................................................................................................... 261
8.5.1 Standard conversion instructions...................................................................................... 261
8.5.2 ASCII character array conversion....................................................................................... 264
8.5.3 Number value to ASCII string conversion .......................................................................... 270
8.5.4 ASCII sub-string to number value conversion .................................................................... 274
8.5.5 Encode and decode.......................................................................................................... 276
8.6 Counters.......................................................................................................................... 278
8.6.1 Counter instructions ........................................................................................................ 278
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8.6.2 High-speed counter instructions....................................................................................... 282
8.6.3 High-speed counter summary .......................................................................................... 285
8.6.4 Noise reduction for high-speed inputs .............................................................................. 286
8.6.5 High-speed counter programming.................................................................................... 287
8.6.6 Example initialization sequences for high-speed counters................................................. 298
8.7 Pulse output .................................................................................................................... 305
8.7.1 Pulse output instruction (PLS) .......................................................................................... 305
8.7.2 Pulse train output (PTO) ................................................................................................... 307
8.7.3 Pulse width modulation (PWM) ........................................................................................ 309
8.7.4 Using SM locations to congure and control the PTO/PWM operation ................................ 310
8.7.5 Calculating the prole table values ................................................................................... 313
8.8 Math ............................................................................................................................... 316
8.8.1 Add, subtract, multiply, and divide ................................................................................... 316
8.8.2 Multiply integer to double integer and divide integer with remainder................................ 320
8.8.3 Trigonometry, natural logarithm/exponential, and square root.......................................... 321
8.8.4 Increment and decrement................................................................................................ 323
8.9 PID .................................................................................................................................. 324
8.9.1 Using the PID wizard ........................................................................................................ 326
8.9.2 PID algorithm................................................................................................................... 331
8.9.3 Converting and normalizing the loop inputs ..................................................................... 334
8.9.4 Converting the loop output to a scaled integer value ........................................................ 335
8.9.5 Forward- or reverse-acting loops ...................................................................................... 335
8.10 Interrupt.......................................................................................................................... 338
8.10.1 Interrupt instructions ....................................................................................................... 338
8.10.2 Interrupt routine overview and CPU model event support ................................................. 339
8.10.3 Interrupt programming guidelines.................................................................................... 341
8.10.4 Types of interrupt events that the S7-200 SMART CPU supports......................................... 342
8.10.5 Interrupt priority, queuing, and example program............................................................. 344
8.11 Logical operations............................................................................................................ 349
8.11.1 Invert .............................................................................................................................. 349
8.11.2 AND, OR, and exclusive OR............................................................................................... 350
8.12 Move............................................................................................................................... 351
8.12.1 Move byte, word, double word, or real ............................................................................. 351
8.12.2 Block move ...................................................................................................................... 352
8.12.3 Swap bytes ...................................................................................................................... 353
8.12.4 Move byte immediate (read and write)............................................................................. 354
8.13 Program control............................................................................................................... 355
8.13.1 FOR-NEXT loop ................................................................................................................ 355
8.13.2 JMP (jump to label).......................................................................................................... 356
8.13.3 SCR (sequence control relay)............................................................................................ 358
8.13.4 END, STOP, and WDR (watchdog timer reset) .................................................................... 365
8.13.5 GET_ERROR (Get non-fatal error code).............................................................................. 366
8.14 Shift and rotate................................................................................................................ 367
8.14.1 Shift and rotate................................................................................................................ 367
8.14.2 Shift register bit............................................................................................................... 370
8.15 String .............................................................................................................................. 372
8.15.1 String (Get length, copy, and concatenate)....................................................................... 372
8.15.2 Copy substring from string ............................................................................................... 374
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8.15.3 Find string and rst character within string....................................................................... 375
8.16 Table ............................................................................................................................... 378
8.16.1 Add to table..................................................................................................................... 378
8.16.2 First-in-rst-out and last-in-rst-out .................................................................................. 379
8.16.3 Memory ll ...................................................................................................................... 381
8.16.4 Table nd......................................................................................................................... 382
8.17 Timer............................................................................................................................... 386
8.17.1 Timer instructions............................................................................................................ 386
8.17.2 Timer programming tips and examples............................................................................. 388
8.17.3 Interval timers ................................................................................................................. 394
8.18 Subroutine....................................................................................................................... 395
8.18.1 CALL (subroutine) and RET (conditional return) ................................................................ 395
8.19 PROFINET......................................................................................................................... 400
8.19.1 Features of the programming instruction "PROFINET" ....................................................... 400
8.19.2 Read and Write data record .............................................................................................. 401
8.19.2.1 Input and output interface of RDREC and WRREC instruction ............................................. 401
8.19.2.2 System-dened error code of the instructions RDREC and WRREC ...................................... 403
8.19.3 Read and Write multiple bytes between physical PROFINET and memory address .............. 404
8.19.3.1 Input and output interface of BLKMOV_BIR and BLKMOV_BIW........................................... 404
8.19.3.2 Error code of the instructions BLKMOV_BIR and BLKMOV_BIW........................................... 404
9 Communication ................................................................................................................................. 405
9.1 CPU communication connections ..................................................................................... 406
9.2 CPU communication ports................................................................................................ 407
9.3 HMIs and communication drivers ..................................................................................... 408
9.4 Ethernet .......................................................................................................................... 409
9.4.1 Overview......................................................................................................................... 409
9.4.2 Local/partner connection ................................................................................................. 410
9.4.3 Sample Ethernet network congurations .......................................................................... 410
9.4.4 Assigning Internet Protocol (IP) addresses......................................................................... 411
9.4.4.1 Assigning IP addresses to programming and network devices............................................ 411
9.4.4.2 Conguring or changing an IP address for a CPU or device in your project.......................... 413
9.4.4.3 Searching for CPUs and devices on your Ethernet network ................................................ 421
9.4.5 Locating the Ethernet (MAC) address on the CPU.............................................................. 422
9.4.6 HMI-to-CPU communication............................................................................................. 423
9.4.7 Open user communication............................................................................................... 425
9.4.7.1 Protocols.......................................................................................................................... 425
9.4.7.2 Connections .................................................................................................................... 426
9.4.7.3 Ports and TSAPs ............................................................................................................... 426
9.4.8 PROFINET......................................................................................................................... 428
9.4.8.1 Introduction..................................................................................................................... 428
9.4.8.2 I-Device ........................................................................................................................... 428
9.4.8.3 Device database le in XML: GSDML ................................................................................. 431
9.4.8.4 GSDML Management ....................................................................................................... 431
9.4.8.5 PROFINET device naming ................................................................................................. 434
9.4.8.6 LED status indicators for PROFINET network...................................................................... 437
9.4.8.7 Conguring CPU as a controller ........................................................................................ 438
9.4.8.8 Conguring CPU as an I-Device without lower-level PROFINET IO system ........................... 446
9.4.8.9 Conguring an I-Device project with lower-level PROFINET IO system ................................ 449
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9.4.8.10 Example: Conguring a PROFINET network ....................................................................... 451
9.5 PROFIBUS......................................................................................................................... 466
9.5.1 EM DP01 PROFIBUS DP module......................................................................................... 468
9.5.1.1 Distributed Peripheral (DP) standard communications....................................................... 468
9.5.1.2 Using the EM DP01 to connect an S7-200 SMART as a DP device ....................................... 468
9.5.1.3 Conguring the EM DP01 ................................................................................................. 470
9.5.1.4 Data consistency.............................................................................................................. 471
9.5.1.5 Supported congurations................................................................................................. 472
9.5.1.6 Installing the EM DP01 GSD le ........................................................................................ 472
9.5.1.7 Conguring the EM DP01 I/O............................................................................................ 474
9.5.1.8 Example of V memory and I/O address area ...................................................................... 477
9.5.1.9 User program considerations............................................................................................ 478
9.5.1.10 LED status indicators for the EM DP01 PROFIBUS DP.......................................................... 480
9.5.1.11 Using HMIs and S7-CPUs with the EM DP01 ...................................................................... 481
9.5.1.12 Device database le: GSD ................................................................................................. 482
9.5.1.13 PROFIBUS DP communications to a CPU example program ................................................ 485
9.5.1.14 Reference to the EM DP01 PROFIBUS DP module technical specications ........................... 488
9.6 RS485.............................................................................................................................. 488
9.6.1 PPI protocol ..................................................................................................................... 489
9.6.2 Baud rate and network address ........................................................................................ 490
9.6.2.1 Denition of baud rate and network address..................................................................... 490
9.6.2.2 Setting the baud rate and network address for the S7-200 SMART CPU.............................. 490
9.6.3 Sample RS485 network congurations.............................................................................. 492
9.6.3.1 Single-master PPI networks .............................................................................................. 492
9.6.3.2 Multi-master and multi-slave PPI networks........................................................................ 493
9.6.4 Assigning RS485 addresses .............................................................................................. 494
9.6.4.1 Conguring or changing an RS485 address for a CPU or device in your project................... 494
9.6.4.2 Searching for CPUs and devices on your RS485 network.................................................... 497
9.6.5 Building your network...................................................................................................... 498
9.6.5.1 General guidelines........................................................................................................... 498
9.6.5.2 Determining the distances, transmission rates, and cable lengths for your network ........... 499
9.6.5.3 Repeaters on the network ................................................................................................ 499
9.6.5.4 Specications for RS485 cable .......................................................................................... 500
9.6.5.5 Connector pin assignments .............................................................................................. 500
9.6.5.6 Biasing and terminating the network cable....................................................................... 501
9.6.5.7 Biasing and terminating the CM01 signal board................................................................ 502
9.6.5.8 Using HMI devices on your RS485 network ....................................................................... 503
9.6.6 Freeport mode................................................................................................................. 504
9.6.6.1 Creating user-dened protocols with Freeport mode......................................................... 504
9.6.6.2 Using the RS232/PPI Multi-Master cable and Freeport mode with RS232 devices................ 506
9.7 RS232.............................................................................................................................. 507
10 Libraries ............................................................................................................................................. 509
10.1 Library types (Siemens and user-dened) ......................................................................... 509
10.2 Overview of Modbus communication ............................................................................... 511
10.2.1 Modbus addressing.......................................................................................................... 511
10.2.2 Modbus read and write functions ..................................................................................... 514
10.3 Modbus RTU library.......................................................................................................... 514
10.3.1 Modbus communication overview.................................................................................... 514
10.3.1.1 Modbus RTU library features ............................................................................................ 514
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10.3.1.2 Requirements for using Modbus instructions .................................................................... 515
10.3.1.3 Initialization and execution time for Modbus protocol....................................................... 517
10.3.2 Modbus RTU master......................................................................................................... 517
10.3.2.1 Using the Modbus RTU master instructions....................................................................... 517
10.3.2.2 MBUS_CTRL / MB_CTRL2 instruction (initialize master)...................................................... 519
10.3.2.3 MBUS_MSG / MB_MSG2 instruction.................................................................................. 520
10.3.2.4 Modbus RTU master execution error codes ....................................................................... 523
10.3.3 Modbus RTU slave............................................................................................................ 525
10.3.3.1 Using the Modbus RTU slave instructions.......................................................................... 525
10.3.3.2 MBUS_INIT instruction (initialize slave)............................................................................. 526
10.3.3.3 MBUS_SLAVE instruction.................................................................................................. 528
10.3.3.4 Modbus RTU slave execution error codes .......................................................................... 529
10.3.4 Modbus RTU master example program ............................................................................. 529
10.3.5 Modbus RTU advanced user information........................................................................... 531
10.4 Modbus TCP library .......................................................................................................... 533
10.4.1 Modbus TCP library features............................................................................................. 533
10.4.2 Modbus TCP client ........................................................................................................... 535
10.4.2.1 MBUS_CLIENT instruction................................................................................................. 535
10.4.2.2 Modbus TCP client execution error codes.......................................................................... 538
10.4.3 Modbus TCP server........................................................................................................... 539
10.4.3.1 MBUS_SERVER instruction ................................................................................................ 539
10.4.3.2 Modbus TCP server execution error codes......................................................................... 540
10.4.4 Example: Modbus TCP application .................................................................................... 541
10.4.5 Modbus TCP advanced user information........................................................................... 546
10.4.6 Modbus TCP general exception codes ............................................................................... 548
10.4.7 Modbus TCP general communication exception codes ...................................................... 549
10.5 Open user communication library .................................................................................... 550
10.5.1 Parameters common to the OUC library instructions......................................................... 551
10.5.2 Open user communication library instructions.................................................................. 553
10.5.2.1 TCP_CONNECT instruction................................................................................................ 553
10.5.2.2 ISO_CONNECT instruction ................................................................................................ 556
10.5.2.3 UDP_CONNECT instruction ............................................................................................... 559
10.5.2.4 TCP_SEND instruction....................................................................................................... 561
10.5.2.5 TCP_RECV instruction ....................................................................................................... 563
10.5.2.6 UDP_SEND instruction...................................................................................................... 566
10.5.2.7 UDP_RECV instruction ...................................................................................................... 569
10.5.2.8 DISCONNECT instruction .................................................................................................. 571
10.5.3 Open user communication library instruction error codes ................................................. 573
10.5.4 Open user communication library example....................................................................... 574
10.5.4.1 Active partner (client) ...................................................................................................... 574
10.5.4.2 CheckErrors subroutine .................................................................................................... 583
10.5.4.3 Active partner symbol table.............................................................................................. 584
10.5.4.4 Passive partner (server).................................................................................................... 585
10.5.4.5 CheckErrors subroutine .................................................................................................... 592
10.5.4.6 Passive partner symbol table ............................................................................................ 592
10.6 PN Read Write Record library ............................................................................................ 592
10.6.1 PN Read Write Record features.......................................................................................... 592
10.6.2 Input and output interface of PN Read Write Record library ............................................... 593
10.6.3 Denition of parameters for input signal "STATUS" ............................................................ 594
10.6.4 System_dened error code of the library PN Read Write Record ......................................... 594
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S7-200 SMART
12 System Manual, V2.7, 08/2022, A5E03822230-AK
10.7 USS library....................................................................................................................... 595
10.7.1 USS communication overview.......................................................................................... 595
10.7.1.1 USS protocol overview ..................................................................................................... 595
10.7.1.2 Requirements for using the USS protocol .......................................................................... 596
10.7.1.3 Calculating the time required for communicating with the drive ....................................... 597
10.7.2 USS program instructions................................................................................................. 597
10.7.2.1 Using the USS protocol instructions .................................................................................. 597
10.7.2.2 USS_INIT instruction ........................................................................................................ 598
10.7.2.3 USS_CTRL instruction ....................................................................................................... 600
10.7.2.4 USS_RPM_x instruction .................................................................................................... 603
10.7.2.5 USS_WPM_x instruction ................................................................................................... 606
10.7.2.6 USS protocol execution error codes .................................................................................. 608
10.7.2.7 USS protocol example program ........................................................................................ 609
10.8 SINAMICS Library ............................................................................................................. 611
10.8.1 SINA_POS instruction ....................................................................................................... 612
10.8.1.1 Prerequisite of using the SINA_POS instruction ................................................................. 612
10.8.1.2 Input and output interface of SINA_POS instruction.......................................................... 615
10.8.1.3 Mode selection of SINAMICS with the SINA_POS instruction.............................................. 621
10.8.1.4 Relative positioning ......................................................................................................... 622
10.8.1.5 Absolute positioning........................................................................................................ 625
10.8.1.6 Setup mode..................................................................................................................... 630
10.8.1.7 Referencing (active referencing)....................................................................................... 633
10.8.1.8 Referencing (set reference point) ..................................................................................... 636
10.8.1.9 Traversing blocks ............................................................................................................. 639
10.8.1.10 Jog .................................................................................................................................. 642
10.8.1.11 Incremental jog ............................................................................................................... 645
10.8.2 SINA_SPEED instruction.................................................................................................... 649
10.8.2.1 Prerequisite of using the SINA_SPEED instruction.............................................................. 649
10.8.2.2 Input and output interface of SINA_SPEED instruction ...................................................... 652
10.8.2.3 Denition of "CongAxis" parameters ............................................................................... 654
10.8.2.4 Example of SINA_SPEED instruction.................................................................................. 654
10.8.3 SINA_PARA_S instruction.................................................................................................. 656
10.8.3.1 Prerequisite of using the SINA_PARA_S instruction............................................................ 656
10.8.3.2 Input and output interface of SINA_PARA_S instruction..................................................... 658
10.8.3.3 Example of the SINA_PARA_S instruction .......................................................................... 663
10.9 Creating a user-dened library of instructions................................................................... 665
11 Debugging and troubleshooting ....................................................................................................... 667
11.1 Debugging your program................................................................................................. 667
11.1.1 Bookmark functions......................................................................................................... 667
11.1.2 Cross reference table........................................................................................................ 667
11.2 Displaying program status................................................................................................ 669
11.2.1 Displaying status in the program editor ............................................................................ 669
11.2.2 Conguring the STL status options ................................................................................... 672
11.3 Using a status chart to monitor your program................................................................... 672
11.4 Forcing specic values...................................................................................................... 674
11.5 Writing and forcing outputs in STOP mode........................................................................ 675
11.6 How to execute a limited number of scans........................................................................ 676
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S7-200 SMART
System Manual, V2.7, 08/2022, A5E03822230-AK 13
11.7 Hardware troubleshooting guide...................................................................................... 678
12 PID loops and tuning.......................................................................................................................... 681
12.1 PID loop denition table ................................................................................................... 682
12.2 Prerequisites .................................................................................................................... 685
12.3 Auto-hysteresis and auto-deviation................................................................................... 685
12.4 Auto-tune sequence......................................................................................................... 686
12.5 Exception conditions........................................................................................................ 687
12.6 Notes concerning PV out-of-range (result code 3)............................................................. 688
12.7 PID Tune control panel ..................................................................................................... 688
13 Open loop motion control ................................................................................................................. 693
13.1 Using the PWM output ..................................................................................................... 694
13.1.1 Conguring the PWM output............................................................................................ 694
13.1.2 PWMx_RUN subroutine .................................................................................................... 695
13.2 Using motion control ....................................................................................................... 696
13.2.1 Maximum and start/stop speeds....................................................................................... 696
13.2.2 Entering the acceleration and deceleration times ............................................................. 697
13.2.3 Conguring the motion proles ........................................................................................ 698
13.3 Features of motion control............................................................................................... 700
13.4 Using Axis of Motion........................................................................................................ 702
13.4.1 Programming an Axis of Motion ....................................................................................... 702
13.4.2 Conguring an Axis of Motion .......................................................................................... 703
13.4.3 Subroutines created by the Motion wizard for the Axis of Motion ...................................... 717
13.4.3.1 Guidelines for using the Motion subroutines..................................................................... 718
13.4.3.2 AXISx_CTRL subroutine .................................................................................................... 718
13.4.3.3 AXISx_MAN subroutine .................................................................................................... 720
13.4.3.4 AXISx_GOTO subroutine................................................................................................... 721
13.4.3.5 AXISx_RUN subroutine ..................................................................................................... 723
13.4.3.6 AXISx_RSEEK subroutine .................................................................................................. 724
13.4.3.7 AXISx_LDOFF subroutine.................................................................................................. 725
13.4.3.8 AXISx_LDPOS subroutine.................................................................................................. 726
13.4.3.9 AXISx_SRATE subroutine .................................................................................................. 727
13.4.3.10 AXISx_DIS subroutine....................................................................................................... 728
13.4.3.11 AXISx_CFG subroutine ..................................................................................................... 728
13.4.3.12 AXISx_CACHE subroutine ................................................................................................. 729
13.4.3.13 AXISx_RDPOS subroutine ................................................................................................. 730
13.4.3.14 AXISx_ABSPOS subroutine................................................................................................ 731
13.4.4 Using the AXISx_ABSPOS subroutine to read the absolute position from a SINAMICS servo
drive................................................................................................................................ 732
13.4.4.1 AXISx_ABSPOS and AXISx_LDPOS subroutines usage examples ......................................... 733
13.4.4.2 Interconnections.............................................................................................................. 734
13.4.4.3 Commissioning................................................................................................................ 735
13.4.4.4 Important facts to know................................................................................................... 738
13.4.5 Axis of Motion example programs .................................................................................... 739
13.4.5.1 Axis of Motion simple relative move (cut-to-length application) example .......................... 739
13.4.5.2 Axis of Motion AXISx_CTRL, AXISx_RUN, AXISx_SEEK, and AXISx_MAN example ................ 741
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S7-200 SMART
14 System Manual, V2.7, 08/2022, A5E03822230-AK
13.4.6 Monitoring the Axis of Motion.......................................................................................... 745
13.4.6.1 Displaying and controlling the operation of the Axis of Motion ......................................... 747
13.4.6.2 Displaying and modifying the conguration of the Axis of Motion..................................... 752
13.4.6.3 Displaying the prole conguration for the Axis of Motion ................................................ 752
13.4.6.4 Error codes for the Axis of Motion (WORD at SMW620, SMW670, or SMW720).................. 753
13.4.6.5 Error codes for the Axis of Motion instruction (seven LS bits of SMB634, SMB684, or
SMB734) ......................................................................................................................... 754
13.4.7 Advanced topics............................................................................................................... 756
13.4.7.1 Understanding the conguration/prole table for the Axis of Motion................................. 756
13.4.7.2 Special memory (SM) locations for the Axis of Motion ...................................................... 763
13.4.8 Understanding the RP Seek modes of the Axis of Motion................................................... 765
13.4.8.1 Selecting the work zone location to eliminate backlash..................................................... 769
13.5 Using Axes group of Motion ............................................................................................. 770
13.5.1 Programming an Axes group of Motion ............................................................................ 770
13.5.2 Conguring an Axes group of Motion ............................................................................... 770
13.5.3 Subroutines created by the Motion wizard for the Axes group of Motion ........................... 776
13.5.3.1 Guidelines for using the Motion subroutines..................................................................... 777
13.5.3.2 GRP0_2/3D_MOVELINEAR subroutine ............................................................................... 777
13.5.3.3 GRP0_MOVEPATH subroutine ........................................................................................... 779
13.5.3.4 GRP0_RESET subroutine ................................................................................................... 780
13.5.4 Axes group of Motion example programs.......................................................................... 782
13.5.5 Stopping the Axes group movement................................................................................. 788
13.5.6 Error codes for the Axes group of Motion (WORD at SMW820) .......................................... 789
13.5.7 Error codes for the Axes group of Motion instruction (seven LS bits of SMB823) ................ 789
13.5.8 Conguration/Path table for the Axes group of Motion...................................................... 790
13.6 Interactions between Axis and Axis group......................................................................... 793
A Technical specications ..................................................................................................................... 795
A.1 General specications ...................................................................................................... 795
A.1.1 General technical specications........................................................................................ 795
A.2 S7-200 SMART CPUs......................................................................................................... 800
A.2.1 CPU ST20, CPU SR20, and CPU CR20s ............................................................................... 800
A.2.1.1 General specications and features .................................................................................. 800
A.2.1.2 Digital inputs and outputs................................................................................................ 805
A.2.1.3 Wiring diagrams............................................................................................................... 808
A.2.2 CPU ST30, CPU SR30, and CPU CR30s ............................................................................... 811
A.2.2.1 General specications and features .................................................................................. 811
A.2.2.2 Digital inputs and outputs................................................................................................ 816
A.2.2.3 Wiring diagrams............................................................................................................... 819
A.2.3 CPU ST40, CPU SR40, CPU CR40s, and CPU CR40............................................................... 822
A.2.3.1 General specications and features .................................................................................. 822
A.2.3.2 Digital inputs and outputs................................................................................................ 828
A.2.3.3 Wiring diagrams............................................................................................................... 830
A.2.4 CPU ST60, CPU SR60, CPU CR60s, and CPU CR60............................................................... 833
A.2.4.1 General specications and features .................................................................................. 833
A.2.4.2 Digital inputs and outputs................................................................................................ 839
A.2.4.3 Wiring diagrams............................................................................................................... 841
A.2.5 Wiring diagrams for sink and source input, and relay output ............................................. 844
A.3 Digital inputs and outputs expansion modules (EMs)........................................................ 845
A.3.1 EM DE08 and EM DE16 digital input specications............................................................ 845
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System Manual, V2.7, 08/2022, A5E03822230-AK 15
A.3.2 EM DT08, EM DR08, EM QR16, and EM QT16 digital output specications ......................... 847
A.3.3 EM DT16, EM DR16, EM DT32, and EM DR32 digital input/output specications................. 851
A.4 Analog inputs and outputs expansion modules (EMs) ....................................................... 857
A.4.1 EM AE04 and EM AE08 analog input specications ........................................................... 857
A.4.2 EM AQ02 and EM AQ04 analog output module specications ........................................... 860
A.4.3 EM AM03 and EM AM06 analog input/output module specications ................................. 862
A.4.4 Step response of the analog inputs................................................................................... 866
A.4.5 Sample time and update times for the analog inputs ........................................................ 866
A.4.6 Measurement ranges of the analog inputs for voltage and current (SB and EM)................. 866
A.4.7 Measurement ranges of the analog outputs for voltage and current (SB and EM) .............. 868
A.5 Thermocouple and RTD expansion modules (EMs)............................................................ 869
A.5.1 Thermocouple expansion modules (EMs) ......................................................................... 869
A.5.1.1 EM AT04 thermocouple specications .............................................................................. 869
A.5.2 RTD expansion modules (EMs) ......................................................................................... 873
A.6 Digital signal boards......................................................................................................... 879
A.6.1 SB DT04 digital input/output specications ....................................................................... 879
A.7 Analog signal boards........................................................................................................ 881
A.7.1 SB AE01 analog input specications ................................................................................. 881
A.7.2 SB AQ01 analog output specications............................................................................... 884
A.8 RS485/RS232 signal boards .............................................................................................. 885
A.8.1 SB RS485/RS232 specications ......................................................................................... 885
A.9 Battery board signal boards (SBs) ..................................................................................... 887
A.9.1 SB BA01 Battery board ..................................................................................................... 887
A.10 EM DP01 PROFIBUS DP module......................................................................................... 889
A.10.1 S7-200 SMART CPUs that support the EM DP01 PROFIBUS DP module ............................... 890
A.10.2 Connector pin assignments for EM DP01 .......................................................................... 891
A.10.3 EM DP01 PROFIBUS DP module wiring diagram................................................................. 892
A.11 S7-200 SMART cables....................................................................................................... 892
A.11.1 S7-200 SMART I/O expansion cable .................................................................................. 892
A.11.2 RS-232/PPI Multi-Master Cable and USB/PPI Multi-Master Cable ......................................... 893
A.11.2.1 Overview......................................................................................................................... 893
A.11.2.2 RS-232/PPI Multi-Master Cable.......................................................................................... 894
A.11.2.3 USB/PPI Multi-Master Cable .............................................................................................. 896
B Calculating a power budget............................................................................................................... 899
B.1 Power budget .................................................................................................................. 899
B.2 Calculating a sample power requirement.......................................................................... 900
B.3 Calculating your power requirement ................................................................................ 901
C Error codes......................................................................................................................................... 903
C.1 Timestamp mismatch....................................................................................................... 903
C.2 PLC non-fatal error codes ................................................................................................. 904
C.3 PLC non-fatal error SM ags ............................................................................................. 906
C.4 PLC fatal error codes ........................................................................................................ 907
C.5 PROFINET alarm............................................................................................................... 908
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S7-200 SMART
16 System Manual, V2.7, 08/2022, A5E03822230-AK
D Special memory (SM) and system symbol names ............................................................................. 909
D.1 SM (Special Memory) overview ........................................................................................ 909
D.2 SMB0: System status........................................................................................................ 911
D.3 SMB1: Instruction execution status................................................................................... 912
D.4 SMB2: Freeport receive character ..................................................................................... 913
D.5 SMB3: Freeport character error......................................................................................... 913
D.6 SMB4: Interrupt queue overow, run-time program error, interrupts enabled, freeport
transmitter idle, and value forced..................................................................................... 913
D.7 SMB5: I/O error status ...................................................................................................... 914
D.8 SMB6-SMB7: CPU ID, error status, and digital I/O points .................................................... 915
D.9 SMB8-SMB19: I/O module ID and errors............................................................................ 915
D.10 SMW22-SMW26: Scan times ............................................................................................ 916
D.11 SMB28-SMB29: Signal board ID and errors........................................................................ 917
D.12 SMB30: (Port 0) and SMB130: (Port 1).............................................................................. 917
D.13 SMB34-SMB35: Time intervals for timed interrupts ........................................................... 918
D.14 SMB36-SMB45 (HSC0), SMB46-SMB55 (HSC1), SMB56-SM65 (HSC2), SMB136-SMB145
(HSC3), SMB146-SMB155 (HSC4), SMB156-SMB165 (HSC5): high-speed counters ............ 918
D.15 SMB66-SMB85 (PTO0/PWM0, PTO1/PWM1), SMB166-SMB169 (PTO0), SMB176-SMB179
(PTO1), and SMB566-SMB579 (PTO2/PWM2): high-speed outputs..................................... 923
D.16 SMB86-SMB94 and SMB186-SMB194: Receive message control........................................ 927
D.17 SMW98: Expansion I/O bus communication errors ............................................................ 929
D.18 SMW100-SMW114 System alarms.................................................................................... 930
D.19 SMB130: Freeport control for port 1 (See SMB30)............................................................. 931
D.20 SMB146-SMB155 (HSC4) and SMB156-SMB165 (HSC5).................................................... 931
D.21 SMB186-SMB194: Receive message control (See SMB86-SMB94)...................................... 931
D.22 SMB480-SMB515: Data log status .................................................................................... 931
D.23 SMB600-SMB749: Axis (0, 1, and 2) open loop motion control ......................................... 932
D.24 SMB650-SMB699: Axis 1 open loop motion control (See SMB600-SMB740) ...................... 933
D.25 SMB700-SMB749: Axis 2 open loop motion control (See SMB600-SMB740) ...................... 933
D.26 SMB800-SMB848: Axes group open loop motion control .................................................. 933
D.27 SMB1000-SMB1049: CPU hardware/rmware ID ............................................................... 934
D.28 SMB1050-SMB1099: SB (signal board) hardware/rmware ID............................................ 935
D.29 SMB1100-SMB1399: EM (expansion module) hardware/rmware ID ................................. 935
D.30 SMB1400-SMB1699: EM (expansion module) module-specic data................................... 938
D.31 SMB1800-SMB1939: PROFINET device status.................................................................... 938
D.32 SMB1940-SMB1946: Web server status ............................................................................ 939
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System Manual, V2.7, 08/2022, A5E03822230-AK 17
E References ......................................................................................................................................... 941
E.1 Often-used special memory bits ....................................................................................... 941
E.2 Interrupt events in priority order....................................................................................... 942
E.3 High-speed counter summary .......................................................................................... 943
E.4 STL instructions ............................................................................................................... 944
E.5 Memory ranges and features............................................................................................ 950
F Ordering information......................................................................................................................... 953
F.1 CPU modules .................................................................................................................. 953
F.2 Expansion modules (EMs) and signal boards (SBs) ........................................................... 953
F.3 Programming software.................................................................................................... 954
F.4 Communication .............................................................................................................. 954
F.5 Spare parts and other hardware ...................................................................................... 954
F.6 Human Machine Interface devices................................................................................... 956
Index .................................................................................................................................................. 959
Table of contents
S7-200 SMART
18 System Manual, V2.7, 08/2022, A5E03822230-AK
Product overview 1
1.1 Security information
Siemens provides products and solutions with industrial security functions that support the
secure operation of plants, systems, machines and networks.
In order to protect plants, systems, machines and networks against cyber threats, it is necessary
to implement – and continuously maintain – a holistic, state-of-the-art industrial security
concept. Siemens’ products and solutions constitute one element of such a concept.
Customers are responsible for preventing unauthorized access to their plants, systems,
machines and networks. Such systems, machines and components should only be connected to
an enterprise network or the internet if and to the extent such a connection is necessary and only
when appropriate security measures (e.g. rewalls and/or network segmentation) are in place.
For additional information on industrial security measures that may be implemented, please
visit (https://www.siemens.com/industrialsecurity).
Siemens' products and solutions undergo continuous development to make them more secure.
Siemens strongly recommends that product updates are applied as soon as they are available
and that the latest product versions are used. Use of product versions that are no longer
supported, and failure to apply the latest updates may increase customers' exposure to cyber
threats.
To stay informed about product updates, subscribe to the Siemens Industrial Security RSS Feed
visit (https://www.siemens.com/cert).
1.2 Product overview
The S7‑200 SMART series of micro-programmable logic controllers (Micro PLCs) can control a
wide variety of devices to support your automation needs.
The CPU monitors inputs and changes outputs as controlled by the user program, which can
include Boolean logic, counting, timing, complex math operations, and communications with
other intelligent devices. The compact design, exible conguration, and powerful instruction
set combine to make the S7‑200 SMART a perfect solution for controlling a wide variety of
applications.
S7-200 SMART
System Manual, V2.7, 08/2022, A5E03822230-AK 19
1.3 S7-200 SMART CPU
The CPU combines a microprocessor, an integrated power supply, input circuits, and output
circuits in a compact housing to create a powerful Micro PLC. After you have downloaded your
program, the CPU contains the logic required to monitor and control the input and output
devices in your application.
3
4
2
5
6
7
8
9
1
①LEDs for the I/O
②Terminal connectors
③Ethernet communication port
④Clip for installation on a stand‐
ard (DIN) rail
⑤Ethernet status LEDs
(under door): LINK, Rx/Tx
⑥Status LEDs: RUN, STOP and
ERROR
⑦RS485 Communication port
⑧Optional signal board
(Standard models only)
⑨Memory card reader (under
door)
(Standard models only)
The CPU provides dierent models with a diversity of features and capabilities that help you
create eective solutions for your varied applications. The dierent models of CPUs are shown
below. For detailed information about a specic CPU, see the technical specications (Page 800).
The S7-200 SMART CPU family includes fourteen CPU models, separated into two lines: the
Compact Line and the Standard Line. The rst letter of the CPU designator indicates a line, either
Compact (C) or Standard (S). The second letter of the designator indicates AC power supply /
relay outputs (R) or DC power supply / DC transistor (T). The number in the designator indicates
the total onboard digital I/O count. The new compact models are designated by a lower case "s"
character (serial port only) following the I/O count.
Note
CPU CRs and CPU CR
S7-200 SMART CPU rmware release V2.4 and V2.5 do not apply to the CPU CRs and CPU CR
models.
Product overview
1.3 S7-200 SMART CPU
S7-200 SMART
20 System Manual, V2.7, 08/2022, A5E03822230-AK
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