Rockwell Automation GMLC Reference Manual - Manual (Page 220)

Publication GMLC-5.2 - November 1999
Direct Drive Control 183
Direct Drive Control
The Direct Drive Control block directly sets the servo output of the
selected physical axis to the commanded voltage, current, or percent of
maximum. The maximum settings are either 10 Volts (V) or 150
milliAmperes (mA).
The Direct Drive Control block resides on the Advanced Motion Palette.
Units
For 1394 or Compact motion controllers, you can specify the servo output
in volts, percentage of full scale, or mA as required in your application.
For IMC-S/23x model Compact controllers, you can use a configurable
servo output that can be set for ±10V (standard) or ±150 mA output (for
use with hydraulic servo and proportional valves).
Integrated (IMC-S/21x models) and Basic (IMC-S/20x models) motion
controllers provide a ±10V servo output for each physical axis. For these
motion controllers, you can specify the servo output either directly in
volts or as a percentage of full scale, as required in your application.
Using the Direct Drive Control Block
!
ATTENTION: The Direct Drive Control block assumes
positive (non-inverted) servo output polarity for proper
operation. If the servo output polarity bit for the axis is set
(B11 = 1 or Enabled), the polarity of the output voltage is
opposite that entered in the Direct Drive Control block. See
the Control Settings block, particularly the Show Control
Setting type, section in this chapter for more on data bits.