Baumuller BM4-O-IEI-01, Operating Instructions Manual, Page: 53 / 92

Operation
Operating Instructions Option Module IEI for b maXX drive PLC BM4-O-
IEI-01
53
of 90
7
In the case of "single" multiplication, the system counts the rising edges of encoder track
U1. In this case, encoder track U2 is for detecting the direction of rotation.
In the case of "double" multiplication, the system counts the rising and falling edges of
encoder track U1. In this case, encoder track U2 is for detecting the direction of rotation.
In the case of "quadruple" the system counts the rising and falling edges of encoder tracks
U1 and U2 (and uses them for detecting the direction of rotation). This is the highest res-
olution of the encoder signal.
With one rotation of the rectangle incremental encoder, the encoder zero track has exact-
ly one pulse with approximately one half of the width of the pulses on encoder track U1
or U2.
Figure 13: Encoder evaluation in simplified form
NOTE
You should note that an encoder emulation does not necessarily respond like a real rectangle
incremental encoder (as shown in simplified form in
Z Figure 13 ).