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

Fault-tolerant systems

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PCS 7, step 7: Modification of hardware

Starting situation

The fault-tolerant system is operating with the new hardware configuration in redundant

system mode.

1. Disconnect all the sensors and actuators from the components you want to remove.

2. Unplug modules of the one-sided I/Os that are no longer required from the racks.

3. Unplug components that are no longer required from the modular DP stations.

4. Remove DP stations that are no longer required from the DP master systems.

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.

System Manual, 03/2012, A5E00267695-11

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

17.4 Removing components in PCS 7