Parker ac890 - Page 509

D-113 Programming
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D
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 di
agnostic 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.