ABB ACS880 Firmware Manual page 34

34 Start-up guide for ACS880 winder control program
Select the source of the tension reference.
Tension reference scaling is then done with
parameter 77.06 Tension reference
The target tension reference is then defined
as:
77.51 Tension reference In
reference Src/ 77.06 Tension reference
scaling) * 77.05 Max
Note: Reference scaling could be set to 0,
then input from parameter
interpreted directly in tension units without
any scaling.
Select the source for feedback device.
With load cell feedback device the incoming
signal is interpreted directly in force units
without any scaling. Value read by the drive
could be seen in signal
measurement.
Define the maximum tension to exert on the
material.
Define the amount of allowed correction to
the speed reference by the PID controller
output in percent of maximum speed at core.
Define the tension controller P-gain.
Define the tension controller integration time.
Dancer speed trim
Dancer absorbs the changes in web tension, which causes the dancer position to change.
The dancer PID controller corrects the position error of the dancer by means of speed
trimming. Configure the following settings:
Set the tension control mode to
speed trim.
Enable the dancer control by setting the
parameter 77.01 Enable tension control
TRUE.
Set the Dancer position set-point. No
particular unit is defined for the dancer
referencing. The maximum input used by the
drive is limited only by parameter
Dancer position max.
Select the source for Dancer position
feedback. The incoming signal is interpreted
directly as is without any scaling.
Define the tension controller P-gain.
Define the tension controller integration time.
scaling.
= (77.03 Tension
tension.
77.03 is
77.70 Load cell
Dancer
to
77.32
77.03 Tension reference Src
77.04 Load cell feedback Src
77.05 Max tension
78.09 PID output range
78.11 P-gain 1
78.12 I-time 2
77.02 Tension control mode
77.01 Enable tension control
77.32 Dancer position max
77.34 Dancer position set-point 1
77.31 Dancer feedback Src
78.11 P-gain 1
78.12 I-time 1