Chapter 8 Troubleshooting
296
Alarm
Code
Alarm
Level
Alarm Name Cause/Treatment
0C0 Actual speed excessive
Cause : This indicates the number of motor rotation exceeded
the number of allowable rotation.
1) The slide resistance of the actuator is locally high.
2) The load is increased too much due to a external
force.
With the reasons above, it can be considered a
sudden speed increase has occurred before
detecting the servo error.
Treatment : Even though this would not occur in normal operation,
check if there is any abnormality in the parts assembly
condition. Also check if there is a possibility that an
external force may be applied in the direction of the
actuator movement.
0C2
Operation
release
Overrun sensor detected
Cause : This indicates that a signal from the OT sensor
(option) installed at the mechanical end is detected.
1) The actuator was moved by hand or by external
force being applied while the servo was OFF
(normal detection).
2) The actuator was jogged or operated by pulse-train
in a condition where the home coordinates were
not yet established and thus the soft stroke limit did
not function correctly (normal detection).
3) The home position achieved is not correct, or in the
case of an absolute type controller the coordinates
have shifted due to an inappropriate absolute reset
position.
4) There is a mismatch between the sensor
characteristics and the setting in Parameter No.19
“Overrun sensor input polarity”, or the wiring layout
is wrong.
5) There is a mistake in the mating of the controller
and actuator, or the settings in Parameters No.3
and 4 “Soft limit value” and Parameter No.77 “Ball
screw limit length” are not appropriate.
Treatment : If 1) or 2) is suspected, move the actuator in the
opposite direction by hand.
If this error occurred inside the effective stroke range,
3), 4), or 5) is a likely cause.
For 3), conduct a home-return operation to check the
home position. Conduct the absolute reset again if it is
the absolute type. Contact us if the home position
would not come to the proper position.
If 4) or 5) are suspected, please contact IAI.
0C4
Cold start
Exceeded allowable time
of exceeding torque
allowing continuous
pressing
Cause : The continuous pressing time exceeds the time set for
parameter No.89 “Allowable time of exceeding torque
allowing continuous pressing”.
Treatment : Check the sequence again.
Set the pressing time to be within the setting time.
To Next Page
Loading...
