2.4 Driver Unit/Simple Absolute Unit Alarm Causes and Countermeasures
C2-25
ME0384-4A
Chapter 2 Troubleshooting
Alarm name Causes/countermeasures
Cause: 1) The workpiece weight exceeds the rated weight, or an
external force is applied and the load increased.
2) The brake is not released. (With brake)
3) The sliding resistance of the actuator is locally excessive.
Countermeasure: 1) Review the workpiece and its surroundings and
remove the cause.
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. If not
released, there may be brake failure, cable
disconnection, or RCON system failure. Contact IAI.
3)
Move the workpiece by hand if possible and check
for any location with excessive sliding resistance.
Check for any distortions on the mounting surface. If
this error occurs even with a single actuator, contact IAI.
Caution
Make sure to resolve the cause before resuming operation.
If you cannot judge whether the cause has been fully
resolved, wait at least 30 minutes before switching
the power ON to prevent motor coil burnout.
P, A
Driver
limited
error
Cause:
Data transmission and reception between the driver unit and encoder is
conducted by serial communication. This error indicates that the data
sent from the driver unit was not received properly at the encoder side.
1) Encoder cable is partially disconnected, or connector is not
connected properly.
2) Influence from noise.
3)
Failure of communication IC mounted on the encoder circuit board.
4)
Failure of communication IC mounted on the driver unit circuit board.
Countermeasure: 1) Confirm that there is no failure in the cable and
connector coupler.
2) Try turning OFF power to all peripheral devices
and moving only the driver unit and actuator. If no
error is generated, the culprit may be noise. Take
measures against noise.
If 3) or 4) is the case, replace the encoder or driver
unit.
Contact IAI if the cause cannot be determined.
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