Mitsubishi Q12PRHCPU - 8.1.4 When the System A;System B CPU module RUN LED is not ON

8
TROUBLESHOOTING
8.1 Troubleshooting Flow
8.1.4 When the System A/System B CPU module "RUN" LED is not ON
8 - 10
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
8.1.4 When the System A/System B CPU module "RUN" LED is not ON
The following flow (Diagram 8.6) is for the case where the System A/System B CPU
module "RUN" LED is not on.
* 1: The operation mode can be confirmed by the "BACKUP" LED. ( CHAPTER 8)
* 2: The control system CPU module can be identified by the "CONTROL" LED. ( CHAPTER 8)
* 3: When the "RUN" LED of the standby system CPU module is flashing in the separate mode, set
the RUN/STOP switch of the standby system CPU module from RUN to STOP to RUN.
* 4: When using the CPU module whose first 5 digits of serial No. is "09012" or later, refer to Sections
8.1.9 and 8.1.10 for the description of error detected by the standby system after switching
systems.
NO
YES(Backup mode)
The "RUN" LED does not light up
Normal (the standby system CPU
module "RUN" LED is not ON)
Reset with the CPU module's
RESET/L.CLR switch
NO
Return the RUN / STOP switch to the
RUN position
Is the running mode
set to backup
mode? *1
YES
Is the control system
CPU module "RUN" LED
not lighting up? *2
Is the "RUN" LED ON?
YES (not ON)
NO
(Flashing)
YES
Is the RUN / STOP
switch set to the
RUN position
1)
NO
(Separate mode)*3