Communication
324 Function Manual, 11/2019, A5E03735815-AH
Communication with the redundant system
S7-1500R/H
Introduction
Communication with the S7-1500R/H redundant system basically functions as with the
S7-1500 standard system.
This chapter describes the special features and restrictions for communication with the
S7-1500R/H redundant system.
Communication options for the S7-1500R/H redundant system
● Open User Communication via TCP/IP, UDP, ISO on-TCP and Modbus/TCP
● S7 communication as server
● HMI communication
● PG communication
● SNMP
● Time-of-day synchronization via NTP
Restrictions for communication with the S7-1500R/H redundant system
● Open User Communication:
– no configured connections
– Secure Open User Communication: Not supported, as certificate management is not
possible for the R/H CPUs.
If you have activated Secure OUC, then although you can compile the user program
and load it, you cannot add certificates to the R/H-CPUs.
– no FDL connections
– Email: The S7-1500R/H CPUs with firmware version V2.6 support the versions < V5.0
of the "TMAIL_C" instruction. Versions from V5.0 are not supported.
– No support of connection descriptions according to "TCON_Param"
● no OPC UA
● no S7 communication as client
● no web server
● PG communication: It is not possible to access two CPUs online at the same time. You
can either access the primary CPU or the backup CPU.
● The CPUs of the S7-1500R/H do not support centrally plugged communication modules.
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