Motor Potentiometer; Scalar Motor Control - ABB ACS880 Firmware Manual

44 Program features


Motor potentiometer

The motor potentiometer is, in effect, a counter whose value can be adjusted up and
down using two digital signals selected by parameters
source and 22.74 Motor potentiometer down
When enabled by 22.71 Motor potentiometer
assumes the value set by
mode selected in 22.71, the motor potentiometer value is either retained or reset over
a power cycle.
The change rate is defined in
would take for the value to change from the minimum
value) to the maximum
and down signals are simultaneously on, the motor potentiometer value does not
change.
The output of the function is shown by
directly be set as the reference source in the main selector parameters, or used as an
input by other source selector parameters.
The following example shows the behavior of the motor potentiometer value.
1
22.73
0
1
22.74
0
22.77
22.80
0
22.76
Settings
Parameters 22.71...22.80


Scalar motor control

It is possible to select scalar control as the motor control method instead of DTC
(Direct Torque Control). In scalar control mode, the drive is controlled with a speed or
frequency reference. However, the outstanding performance of DTC is not achieved
in scalar control.
22.72 Motor potentiometer initial
22.75 Motor potentiometer ramp time
(22.77 Motor potentiometer max
22.80 Motor potentiometer ref
22.75
(page 162).
22.73 Motor potentiometer up
source.
function, the motor potentiometer
value. Depending on the
(22.76 Motor potentiometer min
value) or vice versa. If the up
as the time it
act, which can