Mitsubishi Q12PRHCPU - System Switching Execution Possibility

5
REDUNDANT SYSTEM FUNCTIONS
5.3 The System Switching Function
5.3.3 System Switching Execution Possibility
5 - 44
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
5.3.3 System Switching Execution Possibility
(1) In Backup Mode
System switching execution possibility in Backup Mode is shown in Table5.26
System switching enabled, System switching disabled
* 1: Standby System Operating Status is displayed in Table5.27.
* 2: When the reasons for system switching failure such as standby system power off/being reset,
standby system stop error, tracking cable disconnection, are removed, the system switching may
occur. ( Table5.28 to Table5.32)
* 3: Watchdog timer error corresponds to the "WDT ERROR (error code: 5000 OR 5001)".
* 4: The control system switches to the standby system, but the standby system status does not
change.
Table5.26 System Switching Execution Capability
Standby System Operating
Status *1
Control System Switching Condition
Automatic System Switching Manual System Switching
Stop Error
Other Than
Watchdog
Timer Error
Watchdog
Timer Error
*3
Hardware
Failure
Power Off
Reset
System
Switching
requested
by the
Network
Module
System
Switching
using GX
Developer
System
Switching
by System
Switching
Instruction
Normal
Continuation ERROR
Power OFF
*2
Resetting
*2
Hardware Failure
*2
*4 *4
Watchdog Timer Error
*2 *3
Stop Error Other Than
Watchdog Timer Error
*2
At network fault detection
Memory Copy from Control
System to Standby System
During Online Program Change
Operating Status Inconsistency
Tracking Cable Disconnection
*4 *4
Preparing for Tracking
System Switching Request
Timeout
Executing System Switching