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Issue 1.5
8.
Switching On
Preparation of AC Brushless servo motors and servo-amplifiers requires a little
more attention than that of DC servo-drives. We recommend that switching on
for the first time is done according to the following instructions.
8.1
Switching the Servo-Amplifier On Without a Motor
The first time the amplifier is switched on the enable contacts (connector P12 pins 3 and
4), should be open circuit. This will disable the power stages of the amplifier. The
resolver should be connected to the servo-amplifier and some method of reading the
encoder output, i.e. a Quin PTS system, should also be connected.
The three-motor phases must not be connected to the servo-amplifier.
8.2
Checking LEDS and 7 segment display
LED
"OVER I" red LED normally off
This LED lights up during a short-circuit between two motor phases or a power stage
fault.
The state of the LED and the output stage inhibit are latched. To clear a latched fault it
is necessary to cycle the power. If the power is cycled, ensure that at least 30 seconds
is allowed between switching off and switching back on. If this delay is shortened then
it is possible that the residual power in the smoothing capacitors will hold up the
amplifier control circuits and the alarm latch will not be cleared.
"Braking" yellow LED normally off
This LED lights up when the braking module operates. This is a non latching alarm and
it is quite normal to see this LED illuminate particularly under fast braking conditions
with a heavy load.
Copyright © 1996 Quin Systems Ltd.
Q-Drive Installation Manual
Page 47
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