7.3 Troubleshooting with no alarm generated
7-9
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 10 m, 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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