Step 7, Step 7: Modification Of Hardware - Siemens SIMATIC S7-400H System Manual

17.6.7

STEP 7, step 7: Modification of hardware

Starting situation
The fault-tolerant system is operating with the new hardware configuration in redundant
system mode.
Procedure
1. Disconnect all the sensors and actuators from the components you want to remove.
2. Remove the relevant components from the system.
Result
The removal of non-configured modules does not influence the user program. The same
applies to removing DP stations.
The fault-tolerant system continues to operate in redundant system mode.
S7-400H
System Manual, 03/2012, A5E00267695-11
– Remove the central modules from the rack.
– Remove the modules from modular DP stations
– Remove DP stations from DP master systems.
NOTICE
With switched I/O: Always complete all changes on one segment of the redundant
DP master system before you modify the next segment.
System modifications during operation
17.6 Removing components in STEP 7
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