Product overview
2.2 Functions
IM 155-5 PN HF Interface Module (6ES7155-5AA00-0AC0)
20 Manual, 10/2018, A5E32840985-AB
Configuration control (option handling)
Properties
Configuration control allows you to prepare your distributed I/O system for future extensions
or changes. Configuration control means that you can configure the planned maximum
configuration of your distributed I/O system in advance and vary it later in a flexible manner
by means of the user program.
You can find more information
● In chapter Configuration control (option handling) (Page 25)
● On the Internet (http://support.automation.siemens.com/WW/view/en/29430270)
● In the STEP 7 online help.
System redundancy on S7-400H
Interface to H-CPUs with system redundancy
When system redundancy is used, you can connect the IM 155-5 PN HF
(6ES7155-5AA00-0AC0) interface module to CPUs 41x-5H PN/DP (version 6.0 or higher) of
the S7-400.
These CPUs allow you to operate the interface module as a component of a redundant
system.
Requirements for the IM 155-5 PN HF interface module:
● With STEP 7 V5.5 SP3 and higher, the IM 155-5 PN HF is configured as a system
redundancy device.
● The connection setting (transmission medium/duplex) must be set to "Full duplex".
Examples of system redundancy can be found in the manual Fault-tolerant systems
S7-400H (http://support.automation.siemens.com/WW/view/en/60458386).
Combination of system redundancy and Shared Device
The IM 155-5 PN HF interface module can be connected to up to four IO controllers but only
to one H-CPU pair. As a result, a combination of system redundancy and Shared Device
operation is not possible when redundancy operation is used exclusively.
However, you can operate some of the I/O modules of the interface module in system
redundancy on the H-CPU pair and the other I/O modules with up to two additional IO
controllers in Shared Device operation.
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