S7-400H setup options
3.5 Communication
S7-400H
System Manual, 03/2012, A5E00267695-11
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3.5
Communication
The S7-400H supports the following communication methods and mechanisms:
●
Plant buses with Industrial Ethernet
●
Point-to-point connection
This equally applies to the central and distributed components. Suitable communication
modules are listed in Appendix Function modules and communication processors supported
Communication availability
You can vary the availability of communication with the S7-400H. The S7-400H supports
various solutions to meet your communication requirements. These range from a simple
linear network structure to a redundant optical two-fiber loop.
Fault-tolerant communication via PROFIBUS or Industrial Ethernet is supported only by the
S7 communication functions.
Programming and configuring
Apart from the use of additional hardware components, there are basically no differences
with regard to configuration and programming compared to standard systems. Fault-tolerant
connections only have to be configured; specific programming is not necessary.
All communication functions required for fault-tolerant communication are integrated in the
operating system of the fault-tolerant CPU. These functions run automatically in the
background, for example, to monitor the communication connection, or to automatically
change over to a redundant connection in the event of error.
Additional information
For detailed information on communication with the S7-400H, refer to
