ABB ACS860 - Page 281

Parameters 281
Estimate Calculated speed and position estimates are used. The
values are scaled from the motor side to the load side using
the inverted ratio between 90.61 Gear numerator and 90.62
Gear denominator (ie. 90.62 divided by 90.61).
3
Motor feedback The source selected by parameter 90.41 Motor feedback
selection for motor feedback is also used for load feedback.
Any difference between the motor and load speeds (and
positions) can be compensated by using the inverted ratio
between 90.61 Gear numerator and 90.62 Gear denominator
(ie. 90.62 divided by 90.61).
4
90.52 Load speed filter
time
Defines a filter time for load speed feedback (90.03 Load
speed).
4 ms
0 … 10000 ms Load speed filter time. -
90.53 Load gear
numerator
Parameters 90.53 and 90.54 define a gear function between
the load (ie. driven equipment) speed and the encoder
feedback selected by parameter 90.51 Load feedback
selection. The gear can be used to correct a difference
between the load and encoder speeds for example if the
encoder is not mounted directly on the rotated machinery.
See also section Load and motor feedback (page 43).
Note: This parameter cannot be changed while the drive is
running.
1
-2147483648 …
2147483647
Load gear numerator. -
90.54 Load gear
denominator
See parameter 90.53 Load gear numerator.
Note: This parameter cannot be changed while the drive is
running.
1
-2147483648 …
2147483647
Load gear denominator. -
90.55 Load feedback fault Selects how the drive reacts to loss of load feedback. Fault
Fault Drive trips on a 73A1 Load feedback fault. 0
Warning Drive generates an A798 Encoder option comm loss or A7B1
Load speed feedback warning and continues operation using
estimated feedbacks.
1
90.56 Load position offset Defines a load-side position offset. The resolution is
determined by parameter 90.57 Load position resolution.
0 rev
-2147483648 …
2147483647 rev
Load-side position offset. -
90.58 Pos counter init
value int
Defines an initial position (or distance) for the position counter
(as an integer value) when parameter 90.59 Pos counter init
value int source is set to Pos counter init value int.
See also section Position counter (page 44).
0
-2147483648 …
2147483647
Initial integer value for position counter. -
No. Name/Value Description Def/FbEq16
90.53 Load gear numerator
90.54 Load gear denominator
Load speed
Encoder speed
=