2.4 Driver Unit/Simple Absolute Unit Alarm Causes and Countermeasures
C2-17
ME0384-4A
Chapter 2 Troubleshooting
Alarm name Causes/countermeasures
Cause: Motor rotation speed exceeded the allowable rotation speed.
1) The sliding resistance of the actuator is locally excessive.
2) External force is applied momentarily.
A sudden speed increase may have occurred before
detecting the servo error.
Countermeasure:
This does not occur in normal operation, so confirm that
there are no assembly errors. Also, confirm whether
external force is applied in the direction of travel.
Cause: 2 or more seconds have passed without being able to move
after receiving the travel command.
1)
Connection failure or disconnection of the actuator connecting cable.
2) The brake cannot be released (for models with brake).
3) The load on the motor is large due to external force.
4) The sliding resistance of the actuator is excessive.
Countermeasure: 1)
Check the wiring status of the actuator connecting cable.
2) If there is no problem with the 24 VDC power
supplied to the control power connector of the
gateway unit, the RCON system may be faulty.
Contact IAI.
3) Confirm that there are no assembly errors in
machine components.
4)
If the load weight is within the specifications, turn OFF the
power supply and manually check the sliding resistance.
0C2
S
Driver
limited
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 received external force
while the servo was OFF (normal detection).
2) A jog operation was made under a condition that the home
coordinates are not established and the soft stroke limit
would not work properly.
3) The home position achieved by home return 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 combination of the controller and
actuators, or the setting in Parameter No. 3 and 4 “Soft
Limit” or Parameter No. 77 “Ball Screw Lead Length” is
inappropriate.
Countermeasure: 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. If 3) is
suspected, check the home position.
Conduct the absolute reset again if it is the absolute type.
If 4) or 5) is suspected, please contact IAI.
A
Driver
limited
system transition
command
Cause: 1) Operation was switched to normal position control operation
during "damping control" operation.
2) Operation was switched to "damping control" operation
during normal position control operation.
Countermeasure: For both 1) and 2), change the sequence so that the
next operation is performed after confirming that
positioning complete signal PEND is ON.
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