Step 7, Step Vii: Modification Of Hardware; Step 7, Step Viii: Editing And Downloading Organization Blocks - Siemens SIMATIC S7-400H System Manual

System modifications in operation
14.6 Removing components in STEP 7
14.6.7

STEP 7, step VII: Modification of hardware

Starting situation
The fault-tolerant system is operating with the new hardware configuration in redundant
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 is operating in redundant mode.
14.6.8

STEP 7, step VIII: Editing and downloading organization blocks

Starting situation
The fault-tolerant system is operating in redundant mode.
Procedure
1. Make sure that the interrupt OBs 4x and 82 no longer contain any interrupts of the
2. Download the modified OBs and the corresponding program elements to the PLC.
Result
The fault-tolerant system is operating in redundant mode.
232
– 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.
removed components.
System Manual, 09/2007, A5E00267695-03
S7-400H