Failure And Replacement Of A Communication Module - Siemens SIMATIC S7-400H System Manual

13.2.4

Failure and replacement of a communication module

This section describes the failure and replacement of communication modules for
PROFIBUS and Industrial Ethernet.
The failure and replacement of communications modules for PROFIBUS DP are described in
section Failure and replacement of a PROFIBUS-DP master (Page 196).
Starting situation
Failure
The S7-400H is in redundant mode and a
communication module fails.
Procedure
To replace a communication module for PROFIBUS or Industrial Ethernet:
Step
1
2
3
S7-400H
System Manual, 09/2007, A5E00267695-03
13.2 Failure and replacement of components during operation
What needs to be done?
Extract the module.
Make sure that the new module has
no parameter data in its integrated
FLASH EPROM and plug it in.
Turn the module back on.
Failure and replacement of components during operation
How does the system react?
Both CPUs report the event in the diagnostics
•
buffer and via appropriate OBs.
In communication via standard connections:
•
Connection failed
In communication via redundant connections:
•
Communication is maintained without
interruption over an alternate channel.
How does the system react?
Both CPUs process the insert/remove-module
•
interrupt OB 83 synchronized with each other.
Both CPUs process the insert/remove-module
•
interrupt OB 83 synchronized with each other.
The module is automatically configured by the
•
appropriate CPU.
The module resumes communication (system
•
establishes communication connection
automatically).
191