Mitsubishi Q12PRHCPU - Error Check; Confirming the Control System;Standby System; Running CPU Modules

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4.9 Error Check
4
PROCEDURE FOR STARTING UP A REDUNDANT
SYSTEM
4.9 Error Check
Confirm that no error has occurred in the CPU module by checking the "ERR." LED.
* 1: If any error has occurred in the CPU module, check the details by using the PLC diagnostics of
GX Developer.
Refer to the following manual, for details on CPU module LEDs.
QCPU User's Manual (Hardware Design, Maintenance and Inspection)
4.10 Confirming the Control System/Standby System
Identify the control system/standby system by checking the "CONTROL" LEDs.
4.11 Running CPU Modules
Set the RUN/STOP switch to the RUN position in this order: standby system (System B)
CPU module control system (System A) CPU module.
Table4.2 Checking the "ERR." LED to Check for Errors
CPU Module LED LED (common to System A and System B)
LED Name Normal
Error
*1
ERR. OFF ON/Flashing
Table4.3 Checking the "CONTROL" LED to Identify Control System and Standby System
CPU Module LED
LED (common to System A/System B, i.e., Control
System/Standby System)
LED Name
Control
System
(System A)
Standby
System
(System B)
CONTROL
ON OFF
Diagram 4.15 CPU Module RUN/STOP Switch Position and Setting
Q12PRHCPU
MODE
RUN
ERR.
USER
BAT.
BOOT
BACKUP
CONTROL
SYSTEM A
SYSTEM B
Q12PRHCPU
MODE
RUN
ERR.
USER
BAT.
BOOT
BACKUP
CONTROL
SYSTEM A
SYSTEM B
CPU module
Power Switch
STOP RUN