Using the Hot Standby Tab
Original instructions
Viewing the Hot Standby Tab
Configure Hot Standby values in the Hot Standby tab of the Control Expert editor:
Description of the Hot Standby tab:
Item
Option
Value
Description
Run Mode
Controller A
Offline/Online
Indicates which controller is Offline and Online at the next start up.
Controller B
Offline/Online
Invalidate Keypad
Disable
Yes is NOT selected
When selected, the keypad cannot be used to change the Hot Standby submenu.
Enable
Yes is selected
(Check mark displayed)
Standby On application mismatch
Offline
Default
Offline button selected
If mismatch is detected, Standby goes Offline
Online
Default
Online button not selected
If button is selected and mismatch is detected, Standby remains Standby
Swap Address At Switchover
Modbus Port 1
Default
All selected
When selected, enables Modbus switchover to occur.
State RAM: Non-Transfer Area
Start: %MW
1
Starting address of memory area not transferred.
Length
1
Specify the range of the length.
Behavior of the CPU in Run Offline mode
All sections of the MAST task
Default
Regarding the option selected, the CPU will or will not execute the program when CPU is in Run Offline mode.
First section of the MAST task
No section of the MAST task
1. Enter the appropriate values. All values depend on Hot Standby configuration.