Siemens Welding System ST PCS 7 User Manual

Other communication

Siemens ST PCS 7 · November 2007

9

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Modbus is connected to PROFIBUS DP using an ET 200M with 

a CP 341 communications processor. The latter enables the fast 

and efficient exchange of data through point-to-point coupling.
The CP 341 communications module is available in 3 versions 

with different transmission physics:
• RS 232C (V.24)
• 20 mA (TTY)
• RS 422/RS 485 (X.27)
The MODBUS Master or MODBUS Slave loadable drivers are 

needed for the Modbus coupling.

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Order No.

with one RS 232 C (V.24) interface

for linking to SIMATIC S7
• 5  m

• 10  m

• 15  m

with one 20 mA (TTY) interface

for linking to SIMATIC S7
• 5  m

• 10  m

• 50  m

with one RS 422/485 (X.27) 

interface

for linking to SIMATIC S7
• 5  m

• 10  m

• 50  m

MODBUS master (RTU format)
• Single license

• Single license, without software 

or documentation

MODBUS slave (RTU format)
• Single license

• Single license, without software 

or documentation

© Siemens AG 2007