Application And Properties; Connecting The S7-1200 To Profibus; Communications Services Of The Cm - Siemens SIMATIC NET S7-1200 Operating Instructions Manual

Application and properties

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
PROFIBUS communication with the S7-1200 CMs is based on the PROFIBUS DP-V1 protocol.
The supported functions and restrictions are described below.
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
SIMATIC CM 1243-5
Operating Instructions, 01/2023, C79000-G8976-C246-06
1
11