7.3 Troubleshooting with no alarm generated
7-7
7. Troubleshooting
[Condition 3] The unit does not operate even when a command
is sent from a master device such as a PLC
No.
Possible cause
Confirmation/countermeasure
1 I/O signal communication is not established ● Check the input/output status of the I/O
signal with the monitoring function of the
teaching tool. (both the master device and
the ELECYLINDER)
● Make sure the I/O signal voltage is normal.
● Check whether the length of the I/O signal
cable is within 10m, and whether the wire
diameter is thinner than the applicable
value.
● Make sure the wiring processing is correct.
→ For details, refer to "3.4/3.5 Wiring
connections".
2 Disconnection of power I/O cable,
disconnection or contact failure of power
I/O connector
● Check whether the cable is
disconnected/partially disconnected.
● Make sure that the connector and cable are
not pulled out.
→ For details, refer to "3.4/3.5 Wiring
connections".
3 Movement command issued to stopping
position
→ When stopping at "Forward end",
check the ladder sequence by
sending a "Forward" command etc.
Check the ladder sequence and the setting of
the forward end/backward end.
4 Edge signals are input to "Forward" and
"Backward".
Check the ladder sequence and input level
signals.
* For details on I/O signals, refer to "4.4 I/O signals".
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