Starting Situation For Replacement Of The Load Memory - Siemens SIMATIC S7-400H Manual

Failure and Replacement of Components During Operation
Step
5 Switch the power supply module on
again.
6 Perform Memory Reset on the replaced
CPU.
7 Start the replaced CPU (e.g.
STOP³RUN or Start via programming
device).

Starting situation for replacement of the load memory

The S7-400H is in redundant system mode
and an error access to the load memory
is executed.
Procedure
To change the load memory, perform the following steps:
Step
1 Change the memory card on the
stopped CPU.
2 Perform a reset on the CPU with the
replaced memory card.
3 Start the CPU.
10-4
What Has To Be Done?
Failure
What Has To Be Done?
How Does the System React?
•
CPU executes the self-tests and
goes to STOP.
-
•
CPU performs automatic LINK-UP
and UPDATE.
•
CPU changes to RUN and
operates as the standby CPU.
How Does the System React?
•
Affected CPU switches to STOP and
makes a reset request.
•
Partner CPU switches to single mode.
How Does the System React?
-
•
CPU performs automatic LINK-UP
and UPDATE.
•
CPU changes to RUN and
operates as the standby CPU.
Automation System S7-400H Fault-tolerant Systems
-
A5E00068197-07