Siemens PtP Communication Instructions for S7-300/400 Distributed I/O

About this manual

This programming manual provides instructions for using PtP, Modbus, and USS communication blocks in S7-300/400 distributed I/O systems, specifically for ET 200MP and ET 200SP modules. It details the configuration and usage of specific instructions for point-to-point data transfer, Modbus RTU master/slave operations, and USS drive control. This manual is written in Chinese.

What's inside

• Document Guide
• Introduction
• Programming - Using Instructions for Communication
• Error Messages
• Service and Support

Frequently asked questions

What knowledge is required to understand this manual?

Readers must have basic knowledge of automation technology, SIMATIC industrial automation systems, Windows-based computers, and the STEP 7 documentation.

Which communication modules does this manual apply to?

This manual applies to the CM PtP RS232 BA, CM PtP RS422/485 BA, CM PtP RS232 HF, CM PtP RS422/485 HF, and CM PtP communication modules.

How must the instructions be called from the user program?

The instructions must be called cyclically from the user program.