I/O Module - Mitsubishi Electric Q26UD(E)HCPU User Manual

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15.3.11

I/O module

(1) The LEDs of the output module do not turn on
When the LEDs of the output module or output side of the I/O combined module do not turn on, check the
following items.
The corresponding output is OFF when monitored with the
programming tool.
The output number mismatches the module when checked
with System monitor of the programming tool.
The LED does not turn on even though the output of another
I/O module is forcibly turned on.
The LED does not turn on even when it is forcibly turned on
after the module is replaced with another I/O module.
The LED turns on when it is forcibly turned on after the
module is replaced with another I/O module.
(2) Output load does not turn on
When the output load of the output module or I/O combined module does not turn on, check the following items.
The LED corresponding to the module is not on.
Voltage for the power supply load is not added.
Voltage among the output COM terminals is 0V.
The inrush current has exceeded the specified value when
the maximum number of outputs turns on simultaneously.
The module normally operates when replaced with another
I/O module.
Check item
Check item
CHAPTER 15 TROUBLESHOOTING
Corrective action
Reexamine the program.
Change the output number.
The CPU module, base unit, or extension cable has a
hardware error.
Please consult your local Mitsubishi representative.
The module has a hardware failure.
Please consult your local Mitsubishi representative.
Corrective action
Check the items described in
15.3.11 (1).
Check the power supply load wiring and recover the power
supply.
Check the load wire and load, and recover the power supply.
Change the output relay number and keep the load
maximum simultaneous on current within the specified value.
The module has a hardware failure.
Please consult your local Mitsubishi representative.
15
Page 299, Section
299

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