Mitsubishi Melsec-Q Series User Manual page 335

(From previous page)
How is the "POWER" LED
of the power supply module?
YES
Are all the power
supply modules powered on?
Is the wiring of the power supply
module correct?
YES
Is the extension
cable connected properly?
(Isn't IN connected to
IN or OUT connected
to OUT?)
YES
Is the CPU module
RESET/L. CLR switch in
the neutral position?
Other than RESET position
Replace the power supply module and
confirm that the "POWER" LED is turned
on green.
Can the CPU communicate
with the GX Developer?
NO
A hardware fault may have occurred in any of the following modules.
1) CPU module
2) Main base unit, extension base unit
3) Extension cable
4) I/O Module (If one is installed)
5) Interlligent function module (If one is installed)
6) Network module (If one is installed)
Perform operations in due order, starting with the minimum system
where the power supply module and CPU module are mounted on the
main base unit.
If the module will not work, please consalt your local nearest Mitsubishi
or representative, explaining a detailed discription of the problem.
(When off)
Section 12.2.6
the "POWER" LED turns off.
NO
(When on (red))
Section 12.2.8
the "POWER" LED turns on (red).
Check the wiring and power on all
NO
the power supply modules.
NO
Can the CPU communicate
with the GX Developer?
NO
Connect the extension cable properly.
NO
Can the CPU communicate
with the GX Developer?
RESET position
Cancel the RESET.
NO
Can the CPU communicate
with the GX Developer?
YES
Hardware fault of power supply module.
CHAPTER12 TROUBLESHOOTING
Flowchart for when
Flowchart for when
YES
YES
YES
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