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5.4 Operation Mode Change Function
5
REDUNDANT SYSTEM FUNCTIONS
(3) Processing After Operation Mode Change
Table5.42 indicates the redundant system operations after operation mode change.
Table5.42 Operations After Operation Mode Change
Item
In Backup Mode
Control System Standby System
During Normal
RUN and During
Continuation
Error
During Stop
During Stop
Error
During Normal
RUN and During
Continuation
Error
During Stop
During Stop
Error
Program Execution
Executes the
program
Does not execute
the program
Executes system
switching
Does not execute the program
Signal Flow Memory
Reflects the
operation result of
the control
system.
Holds.
When the setting is "Enable tracking of signal flow memory":
Renews the old data into the signal memory flow data
tracked from the control system CPU module.
When the setting is "No tracking":
Holds the current status.
RUN LED ON OFF OFF
END Processing Executes it. Executes it.
Consistency Check Between
Systems A and B
Does not execute the check
Executes the check while the control
system is running.
Does not execute it when the control
system is in STOP status or has
developed a stop.
Does not execute
the check
Tracking Executes the function Executes the function
Does not execute
the function.
Program Change in Ladder Mode
During RUN
Executable
Executes the online program change in the control system.
Does not execute it in the standby system only.
Writing files in RUN Executable
Executes the function when control system has been
rewritten.
Standby system rewrite only is not possible
Input from Input Module on Main
Base Unit
Inputs it Inputs it
Output to Output Module on Main
Base Unit
Outputs it.
Turns OFF output (Y) during system
switching
Does not execute output (Y) in the
standby system.
Does not output it
Output from input module on
extension base unit
Inputs it Does not execute input
Output from input module on
extension base unit
Outputs it. Does not execute output
Automatic Refresh to Network
Module on Main Base Unit
(CPU module network module)
Executes the function Executes the function
Does not execute
output it
Automatic Refresh from network
Module on Main Base Unit
(Network Module CPU Module)
Executes the function Executes the function
Auto refresh to network module on
extension base unit (CPU
module network module)
Executes auto refresh Does not execute auto refresh
Auto refresh from network module
on extension base unit (Network
Module CPU Module)
Executes auto refresh Does not execute auto refresh
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