LSIS XEC-DR32H - Page 129

Chapter 8 Built-in High-speed Counter Function
● Operation example
2) 2-phase count mode
a) 2-phase 4-multiplication operation mode
A-phase input pulse and B-phase input pulse count at rising/falling respectively. If A-phase
input is antecedent to B-phase input, increasing operation starts, and if B-phase input is
antecedent to A-phase input, decreasing operation starts.
▪ Operation example
3) CW(Clockwise)/CCW(Counter Clockwise) operation mode
A-phase input pulse counts at rising , or B-phase input pulse counts at rising.
Increasing operation executed when B-phase input pulse is Low with A-phase input pulse at
rising, and Decreasing operation executed when A-phase input pulse is Low with B-phase
input pulse at rising.
Increasing/Decreasing
classification
A-phase input pulse High A-phase input pulse Low
B-phase input pulse High -
decreasing count
B-phase input pulse Low Increasing count -
▪ Operation example
Increasing
Decreasing
2
3
4
5
6
7
8
9
10
11
12
13
14
15
14
13
12
11
10
9
8
7
6
5
4
3
2
B-phase input pulse
Count value
A-phase input pulse
B-phase input pulse
Count value
A-phase input pulse
Increasing
Decreasing
7
8
9
10
11
9
8
10
7
Increasing
Decreasing
Increasing
B-phase input pulse
Count value
7
8
9
10
9
8
7
8
Off
On
A-phase input pulse
8-5