Step 1: Editing Cpu Parameters Offline; Step 2: Stopping The Reserve Cpu - Siemens SIMATIC S7-400H System Manual

17.7.2

Step 1: Editing CPU parameters offline

Starting situation
The fault-tolerant system is operating in redundant system mode.
Procedure
1. Edit the relevant CPU properties offline in HW Config.
2. Compile the new hardware configuration, but do not load it into the target system just yet.
Result
The modified hardware configuration is in the PG/ES. The target system continues operation
with the old configuration in redundant system mode.
17.7.3

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.
S7-400H
System Manual, 03/2012, A5E00267695-11
Operating Mode" from the menu.
System modifications during operation
17.7 Editing CPU parameters
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