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

10.1.4

Failure and Replacement of a Communication Processor

This section describes the failure and replacement of communication processors
for the PROFIBUS and Industrial Ethernets.
The failure and replacement of communication processors for the PROFIBUS-DP
are described in Section 10.2.1
Initial situation
The S7-400H is in redundant system mode
and one communication processor fails.
Procedure
To replace a communication processor for a PROFIBUS or an industrial Ethernet,
perform the following steps:
Step
1
2
3
Automation System S7-400H Fault-tolerant Systems
A5E00068197-07
Failure and Replacement of Components During Operation
Failure
What Has 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.
How Does the System React?
•
Both CPUs report the event in the
diagnostics buffer and via appropriate
OBs.
•
With communications via standard
connections
Connection failed
•
With communications via redundant
connections
Communications are maintained without
interruption over an alternative channel.
How Does the System React?
Both CPUs process the
insert/remove-module interrupt OB 83
in synchronism.
•
Both CPUs process the
insert/remove-module interrupt
OB 83 in synchronism.
•
The module is automatically
configured by the appropriate
CPU.
The module resumes communications
(system establishes communication
connection automatically).
10-7