Siemens SIMATIC S7 Systeemhandleiding - Pagina 11

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9.4.8.10

Example: Configuring 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

Configuring the EM DP01 ................................................................................................. 470

9.5.1.4

Data consistency.............................................................................................................. 471

9.5.1.5

Supported configurations................................................................................................. 472

9.5.1.6

Installing the EM DP01 GSD file ........................................................................................ 472

9.5.1.7

Configuring 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 file: 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 specifications ........................... 488

9.6

RS485.............................................................................................................................. 488

9.6.1

PPI protocol ..................................................................................................................... 489

9.6.2

Baud rate and network address ........................................................................................ 490

9.6.2.1

Definition 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 configurations.............................................................................. 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

Configuring 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

Specifications 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-defined 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

Libraries ............................................................................................................................................. 509

10.1

Library types (Siemens and user-defined) ......................................................................... 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

S7-200 SMART

System Manual, V2.7, 08/2022, A5E03822230-AK

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