Higen FDA7000 Series - Precautions

6. Troubleshooting and check
6-5
[Servo drive overload characteristics curve]
(note1) If Ano-03 (OVER LOAD) happens often, refer servo drive overload characteristic-
curve and re-establish suitable load of servo motor.
(note2) The overload alarm occurs 25% faster when the motor is in the Stall state.
6.2. Precautions
- When measuring motor voltage: The voltage output from the servo amplifier to the motor is
PWM controlled, so the waveform of pulse phase is output. Since the indicated value can
vary greatly depending on the type of instrument, be sure to use a rectified voltmeter for
accurate measurements.
- When measuring the motor current: The pulse waveform is smoothed to a certain sine wave
by the reactance of the motor, so connect the moving iron type ammeter directly.
Rated
current
(%)
Overload operation
time
Min.
Max.
Set
value
100
∞
120
∞
150
300
1500
760
200
60
150
107
250
20
40
30
300
6
15
7
100
10
10000
1000
100
Motor rated current (%)
300
250
200
150
Operating time (sec)