Siemens SIMATIC CPU 410 System Manual page 57

If you later want to expand the CPU 410 to a fault-tolerant system, proceed as follows:
1. Open a new project and insert a fault-tolerant station.
2. Copy the entire rack from the standard SIMATIC-400 station and insert it twice into the
fault-tolerant station.
3. Insert the required subnets and IO devices.
4. Copy the DP slaves from the old stand-alone operation project to the fault-tolerant station
as required.
5. Reconfigure the communication connections.
6. Carry out all changes required, such as the insertion of one-sided I/O.
For information on how to configure the project, refer to the online help.
Changing the operating mode of a CPU 410
To change the operating mode of a CPU 410, you proceed differently depending on which
operating mode you want to change to and which rack number was configured for the CPU:
Change from stand-alone to redundant operation, rack number 0
1. Insert the synchronization modules into the CPU.
2. Carry out a CPU memory reset or load a project to the CPU in which the CPU is
configured for redundant operation.
3. Insert the synchronization cables into the synchronization modules.
Change from stand-alone mode to redundant operation, rack number 1
1. Set rack number 1 on the CPU.
2. Install the CPU.
3. Carry out a CPU memory reset.
4. Insert the synchronization modules into the CPU.
5. Insert the synchronization cables into the synchronization modules.
Changing from redundant to stand-alone operation
1. Remove the CPU.
2. Remove the synchronization modules.
3. Set rack number 0 on the CPU.
4. Install the CPU.
5. Download a project to the CPU in which the CPU is configured for stand-alone operation.
CPU 410 Process Automation/CPU 410 SMART
System Manual, 05/2017, A5E31622160-AC
I/O configuration variants
6.1 Stand-alone operation
57