ABB ACS880 Firmware Manual page 570

570 Parameters
No. Name / Range /
Selection
90.43 Motor gear
numerator
-2147483648...2147483647
90.44 Motor gear
denominator
-2147483648...2147483647
90.45 Motor feedback
fault
Fault
Warning
90.46 Force open loop
No
Yes
90.48 Motor position axis
mode
Linear
Rollover
Description
Parameters 90.43 and
between the motor speed feedback and motor control.
The gear is used to correct a difference between the
motor and encoder speeds for example if the encoder
is not mounted directly on the motor shaft.
Motor speed
90.43
=
90.44 Encoder speed
See also section Load and motor feedback (page
Note: This parameter cannot be changed while the
drive is running.
Motor gear numerator.
See parameter 90.43 Motor gear
Note: This parameter cannot be changed while the
drive is running.
Motor gear denominator.
Selects how the drive reacts to loss of measured motor
feedback.
Drive trips on a 7301 Motor speed feedback
Encoder fault.
Drive generates an A798 Encoder option comm
A7B0 Motor speed feedback
and continues operation using estimated feedbacks.
Note: Before using this setting, test the stability of the
speed control loop with estimated feedback by running
the drive on estimated feedback (see
feedback selection).
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
Motor feedback selection.
The motor model uses the calculated speed estimate
(regardless of the setting of
selection, which in 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.
90.44 define a gear function
numerator.
or
or A7E1 Encoder
90.41 Motor
90.41 Motor feedback
Def / Type
FbEq 16b / 32b
1 / int32
93).
- / -
1 / int32
- / -
Fault / uint16
7381 0
loss, 1
warning
No / uint16
90.41 0
1
Rollover / uint16
0
1