current waveform with an oscilloscope to verify correct operation of the controller. Attach the oscilloscope leads to the Armature Current test point and

the Sig. Ground test point. Refer to Chapter 7: Test Points for the drive's test point locations. At full rated current, the armature current signal (IA)

should average 1.0 volts since 1.0 volts equals 100% current. There should be six current pulses per mains cycle at all times. The pulses should be

uniformly shaped and evenly spaced, each with a width of 2.8 mS on 60 Hertz supplies, and 3.3 mS on 50 Hertz supplies.

Set Up Field Control

NOTE

If the drive is controlling a permanent magnet motor, set FIELD ENABLE to DISABLED and skip this section.

At this point, the drive/motor combination is operating in field voltage control. This section lists the procedure for setting up for Voltage or Current

control. For best performance, set the field to Current control.

1. Give a 0% speed demand to the drive.

2. Start the drive. Measure the field voltage with a DC voltmeter and verify that it matches the motor nameplate rating. Measure the motor field

current with a Hall effect current meter or a current shunt. If the motor field voltage or current is incorrect, follow the steps below to set in the

correct field supply.

equipment damage or injury to personnel. Do not continue the start up procedure until the DC field supply is within

Press

Failure to set up the field supply correctly can cause dangerous overspeed conditions resulting in serious

Keypad

Display

The DC 4Q 35A line may vary depending on your drive. This is the top of the menu tree.

DC 4Q 35A