Troubleshooting | Operation Failure

[Condition 1] LED1 (Servo/Alarm) do not light up

No.	Possible cause	Confirmation/countermeasure
1	The specified power is not supplied.	Make sure that normal voltage is secured and wiring processing is correct. Also, be sure to check for disconnection or partial disconnection in connectors and wiring. For details, refer to Way of Wiring (for Connect to PIO Control / Connector) or Way of Wiring (for Connect to PIO Control / Cables) for models with pulse motor equipped. For details, refer to Way of Wiring (for Connect to PIO Control / Connector) or Way of Wiring (for Connect to PIO Control / Cables) for models with 24V AC servomotor equipped. For details, refer to Way of Wiring (for Connect to PIO Control / Connector) or Way of Wiring (for Connect to PIO Control / Cables) for models with 200V AC servomotor equipped.
2	The unit is switched to servo OFF with the teaching tool.	Turn ON the servo with PC teaching software or teaching pendant.
3	Controller breakdown	Replace the motor unit. For details, refer to instruction manual for each ELECYLINDER, Motor unit replacement. If the unit still does not recover, contact IAI.

[Condition 2] LED1 (Servo/Alarm) light up red

No.	Possible cause	Confirmation/countermeasure
1	Alarm generated.	Connect the teaching tool. Upon checking the alarm code, resolve the cause. For details, refer to Troubleshooting by Alarm Groups .
2	The stop switch of the teaching pendant is being pressed.	Release the stop switch.

[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 Way of Wiring (for Connect to PIO Control / Connector) or Way of Wiring (for Connect to PIO Control / Cables) for models with pulse motor equipped. For details, refer to Way of Wiring (for Connect to PIO Control / Connector) or Way of Wiring (for Connect to PIO Control / Cables) for models with 24V AC servomotor equipped. For details, refer to Way of Wiring (for Connect to PIO Control / Connector) or Way of Wiring (for Connect to PIO Control / Cables) for models with 200V AC servomotor equipped.

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 Way of Wiring (for Connect to PIO Control / Connector) or Way of Wiring (for Connect to PIO Control / Cables) for models with pulse motor equipped. For details, refer to Way of Wiring (for Connect to PIO Control / Connector) or Way of Wiring (for Connect to PIO Control / Cables) for models with 24V AC servomotor equipped. For details, refer to Way of Wiring (for Connect to PIO Control / Connector) or Way of Wiring (for Connect to PIO Control / Cables) for models with 200V AC servomotor equipped.
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 Operation from Master Device.

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