Siemens ST PCS 7 manual Modbus

© Siemens AG 2007

Communication

Other communication

Modbus

■Overview	■Selection and Ordering Data		Order No.
	CP 341 communications		6ES7 341-1AH01-0AE0
	processor
	with one RS 232 C (V.24) interface
		RS 232 connecting cable
		for linking to SIMATIC S7
		• 5 m
			6ES7 902-1AB00-0AA0
		• 10 m	6ES7 902-1AC00-0AA0
		• 15 m	6ES7 902-1AD00-0AA0

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.

9

CP 341 communications	6ES7 341-1BH01-0AE0
processor
with one 20 mA (TTY) interface
20 mA (TTY) connecting cable
for linking to SIMATIC S7
• 5 m	6ES7 902-2AB00-0AA0
• 10 m	6ES7 902-2AC00-0AA0
• 50 m	6ES7 902-2AG00-0AA0
CP 341 communications	6ES7 341-1CH01-0AE0
processor
with one RS 422/485 (X.27)
interface
RS 422/485 connecting cable
for linking to SIMATIC S7
• 5 m
	6ES7 902-3AB00-0AA0
• 10 m	6ES7 902-3AC00-0AA0
• 50 m	6ES7 902-3AG00-0AA0
Loadable drivers for CP 341
MODBUS master (RTU format)
• Single license
	6ES7 870-1AA01-0YA0
• Single license, without software	6ES7 870-1AA01-0YA1
or documentation
MODBUS slave (RTU format)
• Single license
	6ES7 870-1AB01-0YA0
• Single license, without software	6ES7 870-1AB01-0YA1
or documentation

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Siemens ST PCS 7 · November 2007