Step 2: Stopping The Reserve Cpu; Step 3: Downloading A New Hardware Configuration To The Reserve Cpu - Siemens SIMATIC S7-400H System Manual

System modifications during operation
17.9 Re-parameterization of a module
17.9.3

Step 2: Stopping the reserve CPU

Starting situation
The fault-tolerant system is operating in redundant system mode.
Procedure
1. In SIMATIC Manager, select a CPU of the fault-tolerant system, then choose "PLC >
2. In the "Operating Mode" dialog box, select the reserve CPU, then click "Stop".
Result
The reserve CPU switches to STOP mode, the master CPU remains in RUN mode, the fault-
tolerant system works in single mode. The one-sided I/O of the reserve CPU is no longer
addressed.
17.9.4

Step 3: Downloading a new hardware configuration to the reserve CPU

Starting situation
The fault-tolerant system is operating in single mode.
Procedure
Load the compiled hardware configuration in the reserve CPU that is in STOP mode.
NOTICE
The user program and connection configuration cannot be downloaded in single mode.
Result
The modified parameters in the new hardware configuration of the reserve CPU do not yet
have an effect on ongoing operation.
336
Operating Mode" from the menu.
System Manual, 03/2012, A5E00267695-11
S7-400H