Siemens SIMATIC S7-1200 Manual page 139

Figure 7-2
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
● CM 1243-5
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
● Master of a lower-level DP master system
Bus protocol
The PROFIBUS CMs use the PROFIBUS DP-V1 protocol.
Easy Book
Manual, 11/2011, A5E02486774-04
SIMATIC S7-1200
with CM 1243-5
PROFIBUS
PG/PC/IPC
Configuration example with a CM 1243-5 as PROFIBUS master
Operates as DP slave
Operates as DP master class 1
and
Easy to communicate between devices
Operator control &
monitoring
SINAMICS
7.6 PROFIBUS
ET 200S
139