|Description of Alarm/Error
|On the NC control unit.
|This overload alarm occurs if the motor current exceeds the current required to actuate the thermal relay. Or if the power transformer thermostat or the regenerative discharge unit thermostat operates
|Velocity feedback wire break.
|TGLS goes on.
|If the motor speed exceeds the specified upper limit due to a break in in the velocity feedback wire, the TGLS indicator goes on. The motor is stopped by the dymanic brake.
|OVC goes on.
|If the motor current exceeds the specified upper limit for more than the fixed period( about 600 msec), the OVC indicator goes on. The motor is stopped by the dynamic brake.
|The ON button of the circuit breaker pops up and the LED indicator BRK goes on.
|If an abnormal current exceeding the rating limit of the breaker is applied to the motor, the circuit breaker operates. The motor is stopped by the dynamic brake.
|HVAL goes on.
|If the AC input voltage applied to the servo transformer exceeds the allowable value, the HVAL indictator goes on. The motor is stopped by the dynamic brake.
|Low voltage Alarm.
|LVAL goes on.
|If the AC power source voltage drops abnormally, the LVAL indicator goes on. The motor is stopped by the dynamic brake.
|HCAL goes on.
|If abnormal current is applied to the tranistor bridge circuit, the HCAL indiscator goes on and the motor is stopped by the dynamic brake
|DCAL goes on.
|If the regenerative discharge circuit malfunctions or if the acceleration/deceleration rate is too high, the DCAL indicator goes on and the motor is stopped with the dynamic brake.