Application And Functions; Application - Siemens S7-1500 PROFIBUS Operating Instructions Manual

Application and functions

1.1

Application

Application
The communications module CM 1542-5 is intended for operation in an S7-1500 automation
system. The CM 1542-5 allows the connection of an S7-1500 station to a PROFIBUS fieldbus
system.
As an alternative, the CM can be operated in the following modes:
• Class 1 DP master
• DP slave
Supported communications services
In its current configuration, the CM 1542-5 communications module supports the following
communications services:
• PROFIBUS DP master (class 1)
– DP master according to EN 50170, DP-V1
– DP master mode for DP slaves according to PROFIBUS DP-V0 and DP-V1
– DP master mode for Siemens DP slaves
– Direct data exchange (DP slave to DP slave)
– SYNC/FREEZE
• PROFIBUS DP slave
DP slave according to EN 50170, DP-V0 / DP-V1
Note
DP master or DP slave
The CM only supports operation either as DP master or DP slave.
• FDL
The CM handles the FDL communication using program blocks of Open User
Communication (OUC) see section Configuration, program blocks (Page 29).
SIMATIC CM 1542-5
Operating Instructions, 01/2023, C79000-G8976-C290-07
As a DP master, the CM 1542-5 is capable of enabling direct data exchange for its
assigned DP slaves.
The outputs or inputs can be synchronized and frozen by the user program using
system function DPSYNC_FR.
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