Flowchart For When Output Load Of Output Module Does Not Turn On - Mitsubishi MELSEC- Q Q12PHCPU User Manual

11 TROUBLESHOOTING

11.2.12 Flowchart for when output load of output module does not turn on

The output load does not turn 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?
Is it reaching the
supply voltage
value?
Output module failure
Replace the output module.
Confirm rush current when the load
is at the maximum simultaneous on.
OK
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The following shows the flowchart to be followed when the output load of the output
module does not turn on during PLC operation.
NO
Check output conditions with the
monitor mode of the GX Developer.
NO
indicator of input module
Set the GX Developer in the monitor
0V
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.
POINT
For the trouble that the input signal to the input module is not turned off,
troubleshoot referring to Section 11.5 Examples of I/O ModuleTroubleshooting.
Is the operation
turned on?
On
MELSEC-Q
Off
Voltage measurement among the
modules input and COM terminals.
Check the external wiring and
external input devices.
Please consult your local Mitsubishi
service center or representative,
explaining a detailed description
of the problem.
0V
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