6
Functional description
6.1
Overview of functions
The MM 280/A provides the following function:
●
Position measurement: Forward/backward counter of increments (position
measurement) via A and B track with 4-fold evaluation.
6.2
Position measurement
Position measurements are taken from the evaluation of an incremental pulse
position transducer with 2 pulse signals (A, B), which are phase-shifted by 90°.
All edges can be evaluated. The possible resolution amounts 1/4 of the period's
duration (4-fold evaluation).
Position measurement 4-fold
Fig.6-1:
Impulse signals of the position transducer, resolution 4-fold
A, B
... Pulse signals of the position transducer
P
... Cycle Time
Q
... Resolution 4-fold
The direction of the movement is detected by the evaluation of the phase po-
sition of the pulse signals A and B. See following figure:
Functional description
MM 280/A
© KEBA 2011
Project engineering manual 1.04
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