Siemens CM 1243-5 - Application and properties; Connecting S7-1200 to PROFIBUS; Communications services of the CM

CM 1243-5
Operating Instructions, 04/2011, C79000-G8976-C246-01
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Application and properties
1
1.1 Connecting the S7-1200 to PROFIBUS
Connecting the S7-1200 to PROFIBUS DP
The S7-1200 can be connected to a PROFIBUS fieldbus system with the following
communications modules:
● CM 1242-5
Operates as DP slave
● CM 1243-5
Operates as DP master class 1
If a CM 1242-5 and a CM 1243-5 are installed together, an S7-1200 can perform the
following tasks simultaneously:
● Slave of a higher-level DP master system
and
● Master of a lower-level DP master system
1.2 Communications services of the CM
Bus protocol
The PROFIBUS CMs use the PROFIBUS DP-V1 protocol.
Possible DP slaves for the DP master CM 1243-5
With the DP master module CM 1243-5, the S7-1200 can communicate with the following
DP-V0/V1 slaves:
● Distributed I/O SIMATIC ET200
● S7-1200 CPUs with CM 1242-5
● S7-200 CPUs with PROFIBUS DP module EM 277
● SINAMICS converter
● Drives and actuators from various vendors
● Sensors of various vendors
● S7-300/400 CPU with PROFIBUS interface