Higen FDA7000 Series, Operation Manual

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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
O
p
e
ra
tin
g
t
im
e
(se
c)