Pcs 7, Step 4: Loading A New Hardware Configuration In The Reserve Cpu; Pcs 7, Step 5: Switch To Cpu With Modified Configuration - Siemens SIMATIC S7-400H System Manual

17.3.4

PCS 7, step 4: Loading a new hardware configuration in 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 new hardware configuration of the reserve CPU does not yet have an effect on ongoing
operation.
17.3.5

PCS 7, step 5: Switch 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 >
2. In the "Operating Mode" dialog box, click the "Switch to..." button.
In the "Switch" dialog box, select the "with altered configuration" option and click the "Switch"
button.
1. Acknowledge the prompt for confirmation with "OK".
Result
The reserve CPU links up, is updated (see section Link-up and update (Page 141)) and
becomes the master. The previous master CPU switches to STOP mode, the fault-tolerant
system operates with the new hardware configuration in single mode.
S7-400H
System Manual, 03/2012, A5E00267695-11
Operating Mode" from the menu.
System modifications during operation
17.3 Adding components in PCS 7
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