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3. Setup
Setting rotary direction of the encoder DIR: count up in counterclockwise.
The encoder count up in counterclockwise, so the counter data count down when the
encoder turn in counterclockwise
Phase-A
(Phase-A/UP)
Phase-B
(Phase-B/DOWN)
Phase-Z
(Phase-Z/CLR)
Count data
A
4 multiplier
2 multiplier
7
1 multiplier
Figure 3.9.
If the synchronous clear and the input logic of phase-Z is set to positive logic, shown
as Figure 3.8, the counter is zero-cleared when phase-A falls with the phase-Z input
HIGH regardless of the setting of count input multiplier.
Points
- The logic of phase-Z can be set with software.
- The data after being cleared is not the data set by the initial value.
24
9
8
7
7
6
2-phase Input (count down)
5
0
6
5
6
FFFFFF
FFFFFE
FFFFFD
0
FFFFFF
0
CNT24-2(USB)GY
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