Table of Contents
Advertisement
Failure and replacement of components during redundant operation
11.1 Failure and replacement of central components
Starting situation
Failure
The S7-400H is in redundant system mode and a
communication module fails.
Procedure
If you want to use a communication module that is already being used by another system,
you have to ensure that there are no parameter data saved in the module's integrated
FLASH-EPROM before you swap it.
Proceed as follows to replace a communication module for PROFIBUS or Industrial
Ethernet:
Step
1
2
3
11.1.5
Failure and replacement of a synchronization module or fiber-optic cable
In this section, you will see three different error scenarios:
● Failure of a synchronization module or fiber-optic cable
● Successive failure of both synchronization modules or fiber-optic cables
● Simultaneous failure of both synchronization modules or fiber-optic cables
The CPU indicates by means of LEDs and diagnostics whether the lower or upper redundant
link has failed. After the defective parts (fiber-optic cable or synchronization module) have
been replaced, LEDs IFM1F and IFM2F must go out.
172
What has to be done?
Remove the module.
Insert the new module.
Turn the module back on.
How does the system react?
Both CPUs report the event in the diagnostic
•
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 swapping
•
interrupt OB 83 synchronized with each
other.
Both CPUs process the swapping
•
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).
CPU 410-5H Process Automation/CPU 410 SMART
System Manual, 10/2013, A5E32631667-AA
Advertisement
Table of Contents
