Rockwell Automation 1398-DDM-xxx ULTRA 100 Series Drives Installation Manual - Manual (Page 164)

Publication 1398-5.2 – PDF 1997
8-50 Application and Configuration Examples
8Application and Configuration Examples
Modifying User Units
The units displayed for any ULTRA 100 Series drive may be modified
using a PC with ULTRA Master software. The PC Display Units help
menu defines the various parameters displayed by ULTRA Master.
Default settings for Units are shown in Figure 8.12.
Changing the Display Units Settings
The following example changes the Label and Conversion Factor for
the Position and Acceleration parameters. This example assumes a
2000 line encoder (8000 pulses/revolution).
●
Position - from Counts to Motor Revolutions
●
Acceleration - from RPM/sec
2
to Revs/sec
2
1. Choose the Drive P arameters command icon from the Drive
window and then select the U nits button. The PC Display Units
dialog appears with default settings as shown.
2. Select the Position Label cell, and change counts to Mtr Revs .
3. Select the Position Conversion Factor cell, and change 1000 to
0.125 .
Mathematically 1/8 (0.125) of a motor revolution is 1000 counts,
given that the motor has a 2000 line (8000 count) encoder.
4. Select the Acceleration Label cell, and change RPM/sec to Revs/
sec .
5. Select the Acceleration Conversion Factor cell, and change 1. to
.016 .
Mathematically 1.6 x 10
-2
revs/sec
2
is 1 RPM/sec, given the
motor has a 2000 line (8000 count) encoder.
Figure 8.12 PC Display Units – Default Dialog
Intro
Intro
PC Display Units
Display System Units
OK
Cancel
Help
Parameter:
Velocity
Torque
Position
Acceleration
Label: Conversion
RPM
Amps
counts
RPM/sec.
1.
1.
1.
1000.
= 1 RPM
= 1 Amp
= 1000 counts
= 1 RPM/sec.
Unit Definitions
Factor:
Note: Labels are limited to eight characters.