Mitsubishi Melsec-Q Series User Manual page 318

12.2.19 When output load of the output module does not turn on
Refer to the following flowchart when the output load of the output module does not turn on during programmable
controller operation.
The output load has not turned on.
Is the operation
indicator of output module
turned on?
YES
Is voltage for the
power supply load
added?
YES
What is the voltage
among the various
output COM terminals of the
output module?
The rated voltage
is supplied.
Output module failure
Replace the output module.
Confirm rush current that flows to the
load when the maximum number of
outputs turns on simultaneously.
OK
For the trouble in which input signal to the input module does not turn off, troubleshoot referring to Section 12.5, Examples of
I/O Modules Troubleshooting.
12 - 23
Check output conditions with the
NO
monitor mode of the GX
Developer.
NO
0V
Set the GX Developer in the
monitor mode and check that the
input signal is OFF.
Check the power supply load
wire and recover the power
supply.
Check the load wire and load, and
recover the power supply.
Change the output relay number and
NG
let the load maximum simultaneous
on current to within the specification.
Figure 12.16 When the output load of the output module does not turn on
Is the operation
indicator of input
module turned on?
On
Voltage measurement among
Off
the modules input and COM
terminals.
0V
(Monitor signal off)
Check the external wiring and
external input devices.
Please consult your local Mitsubishi
service center or representative,
explaining a detailed description of
the problem.
Supply
voltage
value