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Result
The standby 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 standby CPU is no
longer addressed.
10.6.4
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.
Note
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.
10.6.5
Step 4: Switching to CPU with modified configuration
Starting situation
The modified hardware configuration is downloaded to the reserve CPU.
Procedure
1. In SIMATIC Manager, select a CPU of the fault-tolerant system, then select "PLC >
2. In the "Operating Mode" dialog box, click the "Switch to..." button.
3. In the "Switch" dialog box, select the "with altered configuration" option and click the
4. Acknowledge the prompt for confirmation with "OK".
CPU 410-5H Process Automation/CPU 410 SMART
System Manual, 10/2013, A5E32631667-AA
Operating Mode" from the menu.
"Switch" button.
System modifications during redundant operation
10.6 Re-parameterization of a module
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