A
Troubleshooting
A-5
3.3 I/O
Symptom
Possible cause
Check items
Corrective action
1
The command does not
work even when the
dedicated input signal is
supplied.
• No 24 V DC is supplied.
• Check the I/O interface
connector stop signal and
24V-power supply
connections.
• Check DI06 (stop) on the
"MONITOR" screen displayed
on the programming box.
• Supply 24 V DC.
• A problem in signal
connection occurred.
• Check the I/O interface
connector wiring.
• Correct the I/O interface
connector wiring.
• An alarm occurred.
• Connect the programming box
and check the alarm by using
self-diagnosis.
• Check the 7-segment LED
display on the front of the
controller.
• Check the cause from the
alarm information.
• Take the corrective action.
2
The dedicated output
signal is not output.
• No 24 V DC is supplied.
• Check the I/O interface
connector 24V-power supply
connections.
• Check DI04 on the
"MONITOR" screen displayed
on the programming box.
• Supply 24 V DC.
• A problem in signal
connection occurred.
• Check the I/O interface
connector wiring.
• Correct the I/O interface
connector wiring.
• An alarm occurred.
• Connect the programming box
and check the alarm by using
self-diagnosis.
• Check the 7-segment LED
display on the front of the
controller.
• Check the cause from the
alarm information.
• Take the corrective action.
3
The general-purpose I/O
signal is not output.
• No 24 V DC is supplied.
• Check the I/O interface
connector 24V-power supply
connections.
• Check DI04 on the
"MONITOR" screen displayed
on the programming box.
• Check the I/O interface
24V-power supply
connection.
• Supply 24 V DC.
• A problem in signal
connection occurred.
• Check the I/O interface
connector wiring.
• Correct the I/O interface
connector wiring.
• A problem in I/O interface
setting occurred.
• Check the ID setting of the
I/O interface.
• Correct the ID setting of the
I/O interface.
• An alarm occurred.
• Connect the programming box
and check the alarm by using
self-diagnosis.
• Check the 7-segment LED
display on the front of the
controller.
• Check the cause from the
alarm information.
• Take the corrective action.
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