ABB ACS880 N5700 Series - Page 465

Def / Type
FbEq 16b / 32b
DescriptionName / Range /
Selection
No.
1 = 1 increment / 1 =
1 increment
Estimate resolution of encoder.1...2000000000
increment
- / uint32Defines the resolution of encoder 1 in increments per
revolution.
Enc1 increments per
revolution
86.11
1 = 1 increment / 1 =
1 increment
Resolution of encoder 1.1...2000000000
increment
- / uint32Defines the resolution of encoder 2 in increments per
revolution.
Enc2 increments per
revolution
86.12
1 = 1 increment / 1 =
1 increment
Resolution of encoder 2.0...2000000000
increment
None / uint16Selects the source of position feedback to be used in
position control.
The status of this source is displayed in 86.1 Axis status.
Actual position
source
86.13
1Encoder 1.Encoder 1
1Encoder 2.Encoder 2
2Estimated position.Estimate
- / int32Parameters 86.14 Load gear numerator and 86.15 Load
gear denominator define a gear function between the
load (ie. driven equipment) speed and the encoder
feedback selected by 86.13 Actual position source. The
gear can be used to correct a difference between the
load and encoder speeds for example if the encoder is
not mounted directly on the rotated machinery.
86.14 Load gear numerator/86.15 Load gear
denominator = Load speed/Encoder speed
If actual position feedback is measured directly from
the load side (after gear), then this ratio is 1. If actual
position feedback is measured from the motor shaft,
this ratio is 1/gear ratio.
Load gear
numerator
86.14
1 = 1 / 1 = 1Load gear numerator.0...2000000000
- / int32See parameter 86.14 Load gear numerator.Load gear
denominator
86.15
1 = 1 / 1 = 1Load gear denominator.1...2000000000
- / int32Parameters 86.16 and 86.17 define the feed constant
for the position calculation:
86.16 Feed constant numerator/86.17 Feed constant
denominator
The feed constant converts rotational motion into
translatory motion. The feed constant is the distance
the load moves during one turn of the load shaft (load
side of the gear).
The translatory load position is shown by parameter
86.2 Actual position. Note that the load position is only
updated after new position input data is received.
Feed constant
numerator
86.16
1 = 1 / 1 = 1Feed constant numerator.0...2000000000
- / int32See parameter 86.16 Feed constant numerator.Feed constant
denominator
86.17
1 = 1 / 1 = 1Feed constant denominator.1...2000000000
Parameters 465