User Manual for Siemens SIMATIC ET 200SP CM PtP Communication Module

Quick guide from the manual

The Siemens SIMATIC ET 200SP CM PtP communication module (6ES7137-6AA00-0BA0) is designed for point-to-point data exchange between programmable controllers and external devices. This manual covers the installation, wiring, configuration, and diagnostics required for operation.

Product overview

The module supports RS232 and RS422/485 interfaces, allowing for flexible communication with various devices. It is short-circuit proof and electrically disconnected. Key supported protocols include Freeport, 3964(R), Modbus master/slave (RTU), and USS.

Connecting

The module connects via a BaseUnit. Ensure the power supply is disconnected before wiring. The module supports two main interface types:

• RS232 interface: Used for serial data transmission with signals including TXD, RXD, RTS, CTS, DTR, DSR, RI, and DCD.
• RS422/485 interface: A differential voltage interface for serial data transmission.

Always ensure the cable shield is installed on a grounding rail to maintain EMC values.

Programming

Communication is managed via special instructions in STEP 7 (TIA Portal). Key instructions include:

• Port_Config: Dynamically assign basic interface parameters.
• Send_P2P / Receive_P2P: Send and receive data to/from a communication partner.
• Modbus_Master / Modbus_Slave: Configure the port for Modbus RTU communication.

Diagnostics

The module features LED displays for status monitoring:

• DIAG: Indicates module status (On = configured/ready, Flashing = startup/not assigned, Flashing = error).
• TX / RX: Indicates data transmission/reception.
• PWR: Indicates power supply status.

Technical specifications

The module operates on 24 V DC (19.2 V to 28.8 V). It has a current consumption of 29 mA and a power loss of 0.7 W. The operating temperature range is 0 °C to 60 °C for horizontal installation and 0 °C to 50 °C for vertical installation.