Siemens SIMATIC S7-1200 Manual page 141

Functions not supported by the CM 1243-5:
SYNC/FREEZE
Get_Master_Diag
Other communications services of the CM 1243-5
The CM 1243-5 DP master module supports the following additional communications
services:
● S7 communication
Configuration and module replacement
You configure the modules, networks and connections in STEP 7 as of version V11.0.
If you want to configure the module in a third-party system, there is a GSD file available for
the CM 1242-5 (DP slave) on the CD that ships with the module and on Siemens Automation
Customer Support pages on the Internet.
The configuration data of the PROFIBUS CMs is stored on the local CPU. This allows simple
replacement of these communications modules when necessary.
You can configure a maximum of three PROFIBUS CMs per station, of which only one may
be a DP master.
Electrical connections
● Power supply
● PROFIBUS
Easy Book
Manual, 11/2011, A5E02486774-04
– PUT/GET services
The DP master functions as a client and server for queries from other S7 controllers or
PCs via PROFIBUS.
– PG/OP communication
The PG functions allow the downloading of configuration data and user programs from
a PG and the transfer of diagnostics data to a PG.
Possible communications partners for OP communication are HMI panels, SIMATIC
panel PCs with WinCC flexible or SCADA systems that support S7 communication.
– The CM 1242-5 is supplied with power via the backplane bus of the SIMATIC station.
– The CM 1243-5 has a separate connector for the 24 VDC power supply.
The RS-485 interface of the PROFIBUS connector is a 9-pin D-sub female connector.
You also have the option of connecting to optical PROFIBUS networks via an Optical Bus
Terminal OBT or an Optical Link Module OLM.
Easy to communicate between devices
7.6 PROFIBUS
141