Properties And Functions; Communication Services; Further Functions - Siemens SIMATIC NET S7-1500 Operating Instructions Manual

Properties and functions

1.1

Communication services

The CM supports the following communications services:
• PROFINET IO
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
1.2

Further functions

Time synchronization with NTP (Network Time Protocol)
The CP can synchronize its local time of day via NTP.
For details, see section Time-of-day synchronization (Page 41).
SIMATIC CM 1542-1
Operating Instructions, 04/2023, C79000-G8976-C355-05
(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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