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Properties And Functions; Communication Services - Siemens CM 1542-1 Operating Instructions Manual

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Properties and functions


Communication services

The CM supports the following communications services:
PROFINET IO allows direct access to IO devices over Industrial Ethernet.
– Real-Time communication (RT)
– Isochronous Real-Time communication (IRT)
– Media redundancy MRP
– Device replacement without exchangeable storage medium
– IO controller
– IO device (iDevice, Shared Device, Prioritized startup)
– Isochronous real time
● Open User Communication
Open User Communication supports the following communications services via the CM
using programmed or configured communications connections:
– TCP (complying with RFC 793), ISO-on-TCP (complying with RFC 1006) and UDP
– Multicast with UDP
● S7 communication
– PG communication
– Operator control and monitoring functions (HMI communication)
– Data exchange over S7 connections
CM 1542-1
Operating Instructions, 07/2019, C79000-G8976-C355-04
(complying with RFC 768)
With the interface via TCP connections, the CM supports the socket interface to
TCP/IP available on practically every end system.
The multicast mode is made possible by selecting a suitable IP address when
configuring connections. A maximum of six multicast groups are supported via UDP.

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