| Type |
LED Indication |
Description of Alarm/Error |
| Overload. |
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. |
| Overcurrent. |
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. |
| Circuit Breaker. |
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. |
| Overvoltage alarm. |
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. |
| Circuit Malfunction. |
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 |
| Circuit malfunction. |
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. |
