Parker AC890PX Series, Engineering Reference

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D-104
A p p e n d i x D : P r o g r a m m i n g
AC890PX AC Drive
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.
OUTPUT PREF: 121.10 Default: —.xxxx Hz Range: —.xxxx Hz
This diagnostic shows the total output (PID Spd Feedforward).
FOLLOWING ERROR PREF: 121.13 Default: —.xxxx deg Range: —.xxxx deg
This diagnostic shows the absolute maximum position loop error over a 1 second period.