ABB ACS880 Firmware Manual page 30

30 Start-up guide for ACS880 winder control program
The diameter calculation function delivers roll diameter feedback. The actual diameter signal
is then used in motor speed and torque reference calculations, as well as roll weight
estimation. The function also provides a means of control over the diameter calculation
process. The list of important settings is given below.
Actual diameter acquisition methods are:
• estimated
• taken from a feedback device
• estimated diameter updated from a feedback device at stop.
Set the diameter of the empty core (mm).
Set the diameter of the full roll (mm).
Estimated mode
When no diameter feedback sensor is available, the actual diameter can be estimated
based on ratio of motor actual speed to the actual line speed.
Set parameter 76.01 Diameter calculation
mode to Estimated.
Define the filter time for diameter calculation.
Define the conditions when diameter count
up or count down conditions are enabled
(diameter estimation active) or disabled
(diameter estimation stopped).
Select the signal source to reset the roll
diameter.
If you need to preset the roll diameter to a
certain value, specify the value in parameter
76.26 Estimation preset
Select the source for the preset command of
roll diameter.
External feedback device mode
In this mode the information about roll diameter is available from an external signal.
Set parameter 76.01 Diameter calculation
mode to External
Define the source for the diameter feedback
signal.
Note: Scale the feedback source according
to minimum/maximum diameter in mm. For
more information, see parameter description
on page 425.
External feedback device at stop mode
The external feedback sensor value is used as the source of actual diameter when the
internal diameter estimation is frozen. Otherwise the estimated diameter is used. The rate
of change of actual diameter is limited according to web thickness.
Note: Diameter estimation is frozen when diameter hold is active.
Diameter calculation settings
value.
feedback.
76.08 Core diameter
76.09 Full roll diameter
76.01 Diameter calculation mode
76.03 Actual diameter filter time
76.05 Count up enable
76.06 Count down enable
76.11 Reset estimated diameter
76.26 Estimation preset value
76.25 Preset estimated diameter
76.01 Diameter calculation mode
76.02 Diameter feedback Src