Error Check; Confirming The Control System/Standby System; Running Cpu Modules - Mitsubishi Q12PRHCPU User Manual

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.
Refer to the following manual, for details on CPU module LEDs.

4.10 Confirming the Control System/Standby System

4.11 Running CPU Modules

Set the RUN/STOP switch to the RUN position in this order: standby system (System B)
CPU module
4
- 16 4.9 Error Check
Table4.2 Checking the "ERR." LED to Check for Errors
CPU Module LED
Q12PRHCPU
MODE BACKUP
RUN CONTROL
ERR. SYSTEM A
USER SYSTEM B
BAT.
BOOT
* 1: If any error has occurred in the CPU module, check the details by using the PLC diagnostics of
GX Developer.
QCPU User's Manual (Hardware Design, Maintenance and Inspection)
Identify the control system/standby system by checking the "CONTROL" LEDs.
Table4.3 Checking the "CONTROL" LED to Identify Control System and Standby System
CPU Module LED
Q12PRHCPU
MODE BACKUP
RUN CONTROL
ERR. SYSTEM A
USER SYSTEM B
BAT.
BOOT
control system (System A) CPU module.
Diagram 4.15 CPU Module RUN/STOP Switch Position and Setting
LED (common to System A and System B)
LED Name
ERR.
LED (common to System A/System B, i.e., Control
System/Standby System)
LED Name
CONTROL
CPU module
Power Switch
STOP RUN
*1
Normal
Error
OFF ON/Flashing
Control Standby
System System
(System A) (System B)
ON OFF