28 QuantumDrive-4000 Manual
91-0027 Rev. E
Copyright © Nutfield Technology, Inc.
6/2010
11.1.4 AGC Fail / Open Loop Condition
If the red LED is on, there may be a failure in the automatic gain control loop or the
servo loop is open.
11.1.5 Servo Ready Signal
When the servo drive is ready, the Servo Ready Hi output signal
(Pin 1 of connector
J8)
goes low (0 volts) and the Servo Fault LED
(Red, D7)
is off. If there is a fault, the
Servo Ready output will go high and the Fault LED
(Red, D7)
is on. The Servo Ready
Lo output is an inverted version of the Servo Ready Hi output.
J8 Pin No.
Fault
No Fault
1 (Servo Ready Hi)
0V
+12V
2 (Servo Ready Lo)
+12V
0V
