Mitsubishi MELSEC Q Series User Manual

18
TROUBLESHOOTING
18.2 Troubleshooting
18.2.11 When output module LED does not turn on
18 - 15
17
STARTING MULTIPLE CPU SYSTEM
18
TROUBLESHOOTING
APPENDICESINDEX
18.2.11 When output module LED does not turn on
The following flowchart shows procedures to be taken when the LED of the output module
does not turn on during operation of the C Controller system.
POINT
Before starting checks with the flowchart below, check if the RUN LED of the C
Controller module is lit.
If not, change the C Controller module status to RUN to turn on the RUN LED.
Figure 18.10 When output module LED does not turn on
Does the output
number match?
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Is the MODE LED lit green?
Is the LED ON on the
<<Module monitor>> tab of the C
Controller setting utility?
It is a hardware fault of the output
module.
Consult your local Mitsubishi service
center or representative, explaining the
details of the problem.
Change the output number.
Reexamine the user program.
Section 18.2.3
The output module LED has not
turned on
Does the LED turn
on when another output
module is forcibly
turned on?
Does the
LED turn on when
the output module is replace with
another output module and is
then forcibly turned
on?
It is a hardware fault of the C Controller
module, base unit and/or extension
cable.
Consult your local Mitsubishi service
center or representative, explaining the
details of the problem.
Section 18.2.2

Mitsubishi MELSEC Q Series Specifications

General

Brand	Mitsubishi
Model	MELSEC Q Series
Category	Controller
Language	English