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5. INSPECTION AND MAINTENANCE
5
−
15
(7) Flowchart when output module load does not turn on
Follow the flowchart below if the output module loads do not turn on during
operation.
Output load does not turn on
Is the
indicator LED of the output
module ON?
Check output mode in monitor
mode from peripheral device.
Is the
indicator LED of the input
module ON?
Measure voltage between
module input and COM
terminals.
Check if input signal is OFF in
monitor mode from peripheral
device.
Is voltage
applied from load power
supply?
Check load power supply
wiring. Reset power supply.
What is
voltage across the output
module output COM
terminals?
Check load wiring and load.
Reset.
Defective output module.
Replace output module.
Check max. rush current
when loads simultaneously
turned on.
Change relay numbers. Keep
current within max. current
for simultaneous loads on.
End
NO
YES
NO
YES
0V
NG
OK
(Monitored
signal OFF)
NO
YES
Contact your nearest
Mitsubishi representative with
details.
Check external
wiring and external
equipment.
0V
Supply
voltag
e
Supply voltage value is provided.
POINT
If the input signal or load does not turn off, refer to Section 5.4.1 (9) "Possible
Problems with I/O Modules."