Siemens SIMATIC S7-400H Manual page 306

Single Operation
Changing the operating mode of an H CPU
To change the operating mode of an H CPU, carry out one of following procedures
depending on the operating mode you wish to change to and the module rack
number of the CPU:
Changing from redundant to single mode
1. Remove the interface module.
2. Perform a power on without backup.
3. Load a project into the CPU in which it is configured for single mode.
Changing from single to redundant mde, mdule rack number 0
1. Connect the synchronization modules set for rack number 0.
2. Perform a power on without backup.
3. Load a project into the CPU in which it is configured for redundant mode.
Changing from single to redundant mode, module rack number 1
1. Connect the synchronization modules set for rack number 1.
2. Perform a power on without backup.
3. Load a project into the CPU in which it is configured for redundant mode.
B-6
Automation System S7-400H Fault-tolerant Systems
A5E00068197-07