NSK MEGATORQUE M-ESA-J0002V25, User Manual

Page: 248 / 294

— 14-7 —
14.2.3. Alarms Related to Motor
14.2.3.1. Resolver Circuit Error
[Output] DRDY: Open
[TA] A0 > Resolver Circuit Error
[LED] A0
[Motor Condition] Servo-OFF
Table 14-7: Cause and Remedy: Resolver circuit error
Cause Remedy
(1) Resolver cable disconnected.
(Refer to “Appendix 2. How to Check Motor
Condition.”)
•
Turn off power, check the resolver cable and
connector.
(2) Breakage of resolver cable.
(Refer to “Appendix 2. How to Check Motor
Condition.”)
•
Replace resolver cable.
(3) Faulty resolver.
(Refer to “Appendix 2. How to Check Motor
Condition.”)
•
Replace Motor.
(4) Faulty PCB.
(When the alarm is on even the resolver and
the cable are normal and the connector is
properly secured.)
•
Replace Driver Unit.
◊
Standard ESA Driver --------------------[Appendix 4]
Note : 1) Check the resolver cable for disconnection and short of wires.
2) Check the connector for contact failure.
3) When the resolver Cable is forced to bend repeatedly, the bending radius and frequency
will affect on the life of the cable. It is necessary to check a insulation and continuity of
the cable periodically.
4) When an excessive current applied to the resolver, which is induced by internal contact
or collision of Motor (rotor and stator), the fuse protecting the exciting circuit of resolver
may blow out. Replace of Motor and Driver Unit is required in such a case.
14.2.3.2. Software Thermal Sensor
[Output] DRDY: Open
[TA] A3 > Overload
[LED] A3
[Motor Condition] Servo-OFF
Table 14-8: Cause and Remedy: Overload
Cause Remedy
(1) Excessive Motor duty cycle.
•
Reduce duty cycle and the load. Re-adjust
acceleration/deceleration.
•
The Motor is overheated and air-cooling is
necessary after the Motor stops. Then turn on
power.
(After stopping operation, keep control power on.)
(2) Mechanical restraint to the Motor such as
brake or an obstacle.
•
Remove mechanical restraint.
(3) Improper gain setting.
•
Readjust gain.
(Refer to “8. Tuning and Trial Running.”)
(4) Unmatched combination of Motor and Driver
Unit.
•
Check the combination.
(Reference number of Motor and Driver Unit.)
Note : Do not change a parameter “OL” setting. It is properly set before shipment.
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