Omron SMARTSTEP A Series User Manual page 221

Troubleshooting
5-3 Troubleshooting
If an error occurs in the machinery, check the type of error using the alarm indicators
and operation status, verify the cause, and take appropriate countermeasures.
5-3-1 Error Diagnosis Using Alarm Display
Display Error
Parameter
setting error
Overcurrent
Regeneration
error
Status when
error occurs
Occurs when con- A value outside of the set-
trol circuit power ting range was previously
supply is turned set in the parameters.
ON.
Control panel error
Occurs when Control panel error
power supply is
Main circuit transistor mod-
turned ON.
ule error
Occurs when Current feedback circuit
servo is turned error
ON.
Main circuit transistor mod-
ule error
Servomotor power line is
short-circuited or grounded
between phases.
Miswiring between U-
phase, V-phase, W-phase,
and ground.
Servomotor winding is
burned out.
Operating above rated out-
put.
Occurs during Error in the regenerative
operation. circuit parts.
External Regeneration
Resistor is disconnected.
There is a short-circuit
missing between B2 and
B3, but the external circuit
resistor is not connected.
Setting error in Pn600
(regeneration resistor
capacity).
Cause of error
Reset the parameters within
the setting range.
Replace the Servo Driver.
Replace the Servo Driver.
Replace the Servo Driver.
Repair the short-circuited or
grounded wire.
Measure the insulation resis-
tance at the Servomotor and, if
there is a short-circuit, replace
the Servomotor.
Correct the wiring.
Measure the winding resis-
tance, and if the winding is
burned out, replace the Servo-
motor.
Lighten the load.
Replace the Servo Driver.
Replace the External Regener-
ation Resistor.
Correctly connect the external
circuit resistor (between B1
and B2).
Set Pn600 correctly.
Chapter 5
Countermeasures
5-7