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The drive is protected if the motor or the motor cable becomes shorted. If this
happens, the diagnostic display on the drive will indicate “2”.
POSSIBLE CAUSES OF THE FAULT
1.
MOTOR IS SHORTED.
2.
MOTOR CABLE IS SHORTED.
3.
DRIVE BRIDGE IS DEFECTIVE.
NOTE: In some applications, a servo motor and amplifier are exposed to a condition that
the user believes the (1) and (2) faults or electronics can protect. The condition is that the
servo motor will be allowed to run into the end of a physical obstruction and cause an
instantaneous stop. Neither the motor nor the electronics can withstand this type of
misuse. The motion controller has software or hardware travel limits to avoid this.
(3)
Resolver Fault
The drive monitors the three resolver signals (REF, SIN, COS). If any of the
three signals are lost, the drive will display a “3” on the diagnostics display.
POSSIBLE CAUSES OF THE FAULT
1.
MOTOR CABLE IS NOT PLUGGED INTO THE MOTOR.
2.
MOTOR CABLE IS SHORTED OR DAMAGED.
3.
RESOLVER ON THE REAR OF THE MOTOR HAS FAILED.
(4)
Logic Supply Fault
The drive monitors its logic supply to insure that it is at minimum operating level.
If any power supply voltage drops below the minimum operating level, the drive
will display a “4” on the diagnostics display. The only way to clear a “4” fault is
by turning power OFF, then ON.
POSSIBLE CAUSES OF THE FAULT
1.
LOW LINE AC LINE VOLTAGE.
2.
POWER SUPPLY FAILURE.
3.
INSUFFICIENT AC LINE SIZING FOR THE AC WIRE, XFMR (IF
REQUIRED) OR BOTH.
(5)
Motor Temperature Fault
The motor has a thermal switch mounted internally. If the temperature is
excessive, the thermal switch will open. The drive will shut down and display a
“5” fault on the diagnostics display.
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