Parker ac890 Reference Manual

Programming
Page D-112 890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D
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POSITION LOOP
SETUP::MOTOR CONTROL::POSITION LOOP
This block controls the position of the motor. It compares a position demand, with position feedback, and generates a speed
demand dependent on the difference. Note that the function blocks Move to Master, Phase Inch, Phase Move, Phase Move
Abs, etc. will not work if this block is not enabled (PREF 3879).
Parameter Descriptions
ENABLE
PREF: 121.07 Default: FALSE Range: FALSE / TRUE
Set True to enable the position loop to operate.
PROP GAIN
PREF: 121.01 Default: 10.0 Range:
The position loop proportional gain.
INTEGRAL TIME
PREF: 121.02 Default: 500.0 ms Range:
The position loop integral time constant.
INTEGRAL DEFEAT
PREF: 121.03 Default: FALSE Range:
When TRUE, this parameter sets the position loop integral to 0.0 and prevents it from operating.
LIMIT
PREF: 121.11 Default: 10.00 % Range: 0.00 to 300.00 %
This parameter sets a symmetric clamp as a percentage of maximum speed, to limit the maximum position loop output of the
block (PID Output).
POSITION DEMAND
PREF: 121.15 Default: —.xx deg Range: —.xx deg
This diagnostic shows the input position demand.
TOTAL OFFSET
PREF: 121.14 Default: —.xxxx Range: —.xxxx
This diagnostic shows the total position offset from the phase control blocks, Phase Inch, Phase Move, Phase Offset & Phase
Tuning.

Parker ac890 Specifications

General

Brand	Parker
Model	ac890
Category	DC Drives
Language	English