Step 3: Downloading A New Hardware Configuration To The Reserve Cpu; Step 4: Switching To Cpu With Modified Configuration - Siemens SIMATIC PCS 7 System Manual

10.5.4

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 CPU parameters in the new hardware configuration of the standby CPU do not
yet have an effect on ongoing operation.
10.5.5

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 choose "PLC >
Operating Mode" from the menu.
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
"Switch" button.
4. Acknowledge the prompt for confirmation with "OK".
Result
The reserve CPU links up, is updated and becomes the master. The previous master CPU
switches to STOP mode, the fault-tolerant system continues operating in single mode.
CPU 410-5H Process Automation/CPU 410 SMART
System Manual, 09/2014, A5E32631667-AB
System modifications during redundant operation
10.5 Editing CPU parameters
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