Mitsubishi Q12PRHCPU - Page 129

5
REDUNDANT SYSTEM FUNCTIONS
5.3 The System Switching Function
5.3.3 System Switching Execution Possibility
5 - 46
1
OVERVIEW
2
SYSTEM CONFIGURATION
3
TRACKING CABLE
4
PROCEDURE FOR STARTING UP A REDUNDANT SYSTEM
5
REDUNDANT SYSTEM FUNCTIONS
6
REDUNDANT SYSTEM NETWORKS
7
PROGRAMMING CAUTIONS
8
TROUBLESHOOTING
Table5.28 Operations When System Switching Cannot Be Executed Due to Standby System Power Off, Resetting or
Hardware Failure
System
Switching
Method
Control System
Switching Condition
System Status Before
System Switching
System Status After
System Switching
Condition
Operation After B System Power
ON OFF or unresetting the CPU
module (RESET/L.CLR switch is set
to the neutral position)
System A System B System A System B
Automatic
System
Switching
Stop Error Other Than
Watchdog Timer Error
Control
System
Standby
System
Control
System
Standby
System
Startup as standby system
Watchdog Timer Error
Control
System
Standby
System
Standby
System
Standby
System
Startup as control system
Hardware Failure
Control
System
Standby
System
Control
System
Standby
System
Startup as control system
Power OFF
Control
System
Standby
System
Control
System
Standby
System
Startup as control system
Reseting
Control
System
Standby
System
Control
System
Standby
System
Startup as control system
System Switching
Request by Network
Module
Control
System
Standby
System
Control
System
Standby
System
System switching will causes system B
to become control system
Manual
System
Switching
System Switching
Using GX Developer
Control
System
Standby
System
Control
System
Standby
System
Startup as standby system
System Switching by
System Switching
Instruction
Control
System
Standby
System
Control
System
Standby
System
Startup as standby system
Table5.29 Operations When System Switching Cannot Be Executed Due to Error Other Than Stop Error in the Standby System
System
Switching
Method
Control System
Switching Condition
Status Before System
Switching
System Status After
System Switching
Condition
Operation After System B Power
OFF ON
System A System B System A System B
Automatic
System
Switching
Stop Error Other Than
Watchdog Timer Errors
Control
System
Standby
System
Standby
System
Control
System
Startup as control system
Watchdog Timer
Control
System
Standby
System
Standby
System
Standby
System
Startup as control system
Hardware Failure
Control
System
Standby
System
Standby
System
Control
System
Startup as control system
Power OFF
Control
System
Standby
System
Standby
System
Control
System
Startup as control system
Reseting
Control
System
Standby
System
Standby
System
Control
System
Startup as control system
System Switching
Request by Network
Module
Control
System
Standby
System
Control
System
Standby
System
System switching will cause system B to
become control system
Manual
System
Switching
System Switching
Using GX Developer
Control
System
Standby
System
Control
System
Standby
System
Startup as standby system
System Switching by
System Switching
Instruction
Control
System
Standby
System
Control
System
Standby
System
Startup as standby system