Pcs7, Step 4: Loading New Hardware Configuration In The Standby Cpu - Siemens SIMATIC S7-400H Manual

Modifications to the System while in Operation
10.2.4 PCS7, Step 4: Loading new Hardware Configuration in the
Standby CPU
Initial situation
The fault-tolerant system is working in Solo mode.
Procedure
Load the compiled hardware configuration in the standby CPU that is in STOP
mode.
Note
The user program and the connection configuration must not be overloaded in
Solo mode.
Result
The new hardware configuration of the standby CPU does not yet have an effect
on current operation.
10-10
S7-400H Programmable Controller Fault-Tolerant Systems
A5E00068197-04