ABB ACS880 Firmware Manual page 389

No. Name/Value
90.46 Force open loop
No
Yes
90.48 Motor position axis
mode
Linear
Rollover
90.49 Motor position
resolution
0...31
90.51 Load feedback
selection
None
Encoder 1
Encoder 2
Estimate
Motor feedback
90.52 Load speed filter
time
0 ... 10000 ms
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Description
Forces the DTC motor model to use estimated motor speed
as feedback. This parameter can be activated when the
encoder data is obviously unreliable because of slippage, for
example.
Note: This parameter only affects the selection of feedback
for the motor model, not for the speed controller.
The motor model uses the feedback selected by
feedback selection.
The motor model uses the calculated speed estimate
(regardless of the setting of
which in this case only selects the source of feedback for the
speed controller).
Selects the axis type for motor position measurement.
Linear.
The value is between 0 and 1 revolutions, and rolls over at
360 degrees.
Defines how many bits are used for motor position count
within one revolution. For example, with the setting of 24, the
position value is multiplied by 16777216 for display in
parameter 90.06 Motor position scaled
Motor position resolution.
Selects the source of load speed and position feedbacks used
in control.
No load feedback selected.
Load feedbacks are updated based on the speed and position
values read from encoder 1.
The values are scaled by the load gear function
gear numerator and 90.54 Load gear
The encoder is set up by the parameters in group
1 configuration.
Load feedbacks are updated based on the speed and position
values read from encoder 2.
The values are scaled by the load gear function
gear numerator and 90.54 Load gear
The encoder is set up by the parameters in group
2 configuration.
Calculated speed and position estimates are used. The
values are scaled from the motor side to the load side using
the inverted ratio between
Gear denominator (ie. 90.62
The source selected by parameter
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
(ie. 90.62 divided by 90.61).
Defines a filter time for load speed feedback
speed).
Load speed filter time.
90.41 Motor
90.41 Motor feedback selection,
(or for fieldbus).
(90.53 Load
denominator).
92 Encoder
(90.53 Load
denominator).
93 Encoder
90.61 Gear numerator and
divided by 90.61).
90.41 Motor feedback
and 90.62 Gear denominator
(90.03 Load
Parameters 389
Def/FbEq16
No
0
1
Rollover
0
1
24
-
None
0
1
2
3
90.62
4
4 ms
-