414
26 REDUNDANT FUNCTION
26.5 System Consistency Check
Execution timing
The following table lists the execution timing of the system consistency check.
*1 Checking the operating status can be disabled in "Backup Mode Setting" of "Redundant Behavior Setting". ( Page 425 Redundant
System Operation Setting)
The function is not executed in the following cases.
• One of the systems has not started up (powered off, reset, or initial processing being performed).
• A stop error has occurred in the CPU module.
• The redundant system is in separate mode.
• The memory copy is being executed.
Item Execution timing
Files • When both systems are simultaneously powered on or reset
• When the other system is powered on or reset while one system is waiting for the other system to start
• When the standby system is powered on or reset while the control system is operating
• When the operation mode is changed to the backup mode
• When the operating status of the CPU module is switched from STOP to RUN
• When the END processing is performed
• When the online program change is completed
• When the systems are switched
• When tracking cables are reconnected
Operating status
*1
• When the standby system is powered on or reset while the control system is operating
• When the operation mode is changed to the backup mode
• When the operating status of the CPU module is switched from STOP to RUN
• When the END processing is performed
• When tracking cables are reconnected
Modules on the main base unit • When both systems are simultaneously powered on or reset
• When the other system is powered on or reset while one system is waiting for the other system to start
• When the standby system is powered on or reset while the control system is operating
• When the operation mode is changed to the backup mode
• When tracking cables are reconnected
SD memory card • When both systems are simultaneously powered on or reset
• When the other system is powered on or reset while one system is waiting for the other system to start
• When the standby system is powered on or reset while the control system is operating
To Next Page
Loading...
