Danfoss MCO 305 Design Manual page 8

MCO 305 Design Guide
Definitions
MLONG
An upper or lower limit for many parameters:
-MLONG = -1,073,741,824
MLONG = 1,073,741,823
Online / Offline Parameters
Changes to online parameters are activated immediately after the data value is changed. Changes to offline
parameters are not activated until you enter [OK] on the LCP.
Quad-counts
Incremental encoders: 4 quad-counts correspond
to one sensor unit.
Absolute encoders: 1:1 (1 qc correspond to one
sensor unit).
Through edge detection, a quadrupling of the incre-
ments is produced by both tracks (A/B) of the
incremental encoder. This improves the resolution.
Encoder Direction
The direction of encoder is determined by which
order the pulses are entering the drive.
Clockwise direction means channel A is 90 electri-
cal degrees before channel B.
Counter Clockwise direction means channel B is
90 electrical degrees before A.
The direction determined by looking into the shaft
end.
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Derivation of quad counts