Parker AC890PX Series, Engineering Reference

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D-116
A p p e n d i x D : P r o g r a m m i n g
AC890PX AC Drive
Parameter Descriptions
REV COUNT PREF: 158.15 Default: 0 Range: —.
This counts the number of turns of the encoder input. It will normally start from zero on power-up. If a multi-turn Endat encoder is fitted, REV
COUNT will be made to match the multi-turn encoder rev count. However, it will continue to count beyond the Endat range of 0 to 4095 revs. It
will count to the limits of a 32 bit number, but the lower 12 bits will be equal to the endat rev count.
CAL FAIL RETRY PREF: 158.24 Default: FALSE Range: FALSE / TRUE
The software will make a number of attempts to calibrate the absolute position (see CALIBRATN STATUS above) and then go into the
CALIBRATN FAILED state. If the problem has been corrected, it is necessary to get it to try again. This can be done either by switching the drive
on and off, changing a related parameter, or by setting CAL FAIL RETRY = TRUE. When the calibration is done, CAL FAIL RETRY will
automatically be reset to FALSE.
ENCODER FEEDBACK
PREF: 158.30 Default: 0.00 Range: —.xx RPM
This parameter shows the mechanical speed of the motor shaft, calculated from the encoder feedback, in RPM.
RESET LINE COUNT PREF: 158.23 Default: FALSE Range: FALSE / TRUE
If TRUE the LINE COUNT X4 diagnostic is reset.
LINE COUNT X4 PREF: 158.31 Default: 0 Range: _
Diagnostic showing the encoder line count times 4, i.e. each edge is counted. This diagnostic is set to 0 at power-up and reset when RESET LINE
COUNT is TRUE.