Rockwell Automation GMLC Reference Manual User Manual

Page 132

Publication GMLC-5.2 - November 1999

Verifying Hookups

Test Increment

Type a distance value, in servo axis position units.

Note: In most cases, a distance value that is the equivalent of 1/4 of a

motor revolution works well.

Motor/Encoder Test

Use the motor/encoder test for servo axes to check the proper electrical
connection of the servo drive and encoder (or other feedback device), and
to establish the correct rotational direction of the servo drive and encoder.
Establishing these motor and encoder polarities insures the axis can not
run away when the feedback loop is closed.

Performing the Motor/Encoder Test

Be sure all external components are connected and the program, including
all configured Axis and Drive data, is downloaded.

Then, do the following:

1. In the Hookups page of the Configure Axis Use dialog box, enter a

distance in position units (between 0.001 and 999.999) as the Test
Increment. (A value representing 1/4 of a motor revolution usually
works best.)

2. Select the Motor/Encoder Test button. Watch the drive and positional

readout.

3. Follow the directions in the message box prompts.

4. When the message box reads Motor Test OK and asks the question

Observed Motion Direction Positive?, select:

ATTENTION: Failure to download can cause
uncontrolled motion when performing controller
diagnostic routines.