Siemens SIMATIC S7-400H System Manual page 450

Stand-alone operation
5. Reconfigure the communication connections.
6. Carry out all changes required, such as the insertion of one-sided I/Os.
For information on how to configure the project refer to the Online Help.
Changing the operating mode of a fault-tolerant CPU
The procedure for changing the operating mode of a fault-tolerant CPU differs depending on
the operating mode you want to switch to and the rack number configured for the CPU:
Changing from redundant to stand-alone mode
1. Remove the synchronization modules
2. Remove the CPU.
3. Set rack number 0 on the CPU.
4. Install the CPU.
5. Download a project with the stand-alone configuration to the CPU.
Changing from stand-alone mode to redundant mode, rack number 0
1. Insert the synchronization modules into the CPU.
2. Run an unbuffered power cycle, for example, by removing and inserting the CPU, or
Changing from stand-alone mode to redundant mode, rack number 1
1. Set rack number 1 on the CPU.
2. Install the CPU.
3. Insert the synchronization modules into the CPU.
450
download a project to the CPU in which it is configured for redundant mode.
System Manual, 03/2012, A5E00267695-11
S7-400H