Functions - Siemens SIMATIC ET 200SP Equipment Manual

2.2

Functions

Introduction
The communications module allows you to exchange data between your own and other
programmable controllers or computers by means of a point-to-point connection, and to
connect various devices from a variety of manufacturers.
Functionality of the CM PtP
The CM PtP communications module offers the following functionality:
• RS232 and RS422/485 interface
• Data transmission rate: 300 to 250000 bit/s
• Maximum frame length:
– Without performance optimization: 2 kbyte
– With performance optimization: 24 bytes for receiving, 30 bytes for sending
• Transmission protocols: Freeport, 3964(R) and Modbus RTU
Note
The USS protocol can be implemented with instructions included in STEP 7 (TIA Portal).
Hardware components of a point-to-point connection
You require certain hardware components for a point-to-point connection with the CM PtP.
Components
Automation system
ET 200SP Distributed I/O System
Interface module (IM)
CM PtP communications module
BaseUnit (6ES7193-6BPx0-0xA0)
Server module
Additional information
Information on configuration and programming of the CM PtP communications module is
available in the function manual CM PtP - Configurations for point-to-point connections
(http://support.automation.siemens.com/WW/view/en/59057093) and in the information
system of STEP 7 (TIA Portal).
CM PtP communications module (6ES7137-6AA01-0BA0)
Equipment Manual, 03/2021, A5E03790792-01
Function
... contains the CPU and PROFINET interface, and the central I/O, if appli-
cable, and executes the user program.
... contains the distributed I/O.
... connects the ET 200SP distributed I/O system with PROFINET IO or any
other fieldbus system and supports all ET 200SP I/O modules.
... communicates via the interface with one or more communication
partners (point-to-point or multipoint connection).
... connects the communications module with the I/O system and the
supply voltage.
... completes the setup of the ET 200SP.
Product overview
2.2 Functions
15