■1 phase, 1 input counter (H/W)
Counting method of 1 phase, 1 input counter (H/W) is as follows.
Input A phase
Input B phase
(Count direction switching input)
Current value
■1 phase, 2 input counter
Counting method of 1 phase, 2 input counter is as follows.
Input A phase
Up-counting input
+1 when OFF→ON
Input B phase
Down-counting input
-1 when OFF→ON
Current value
■2 phase, 2 input counter [1 edge count]
Counting method of 2 phase, 2 input counter [1 edge count] is as follows.
Up/down counter
At up-counting
At down-counting
At up-counting
Input A phase
+1
Input B phase
■2 phase, 2 input counter [2 edge count]
Counting method of 2 phase, 2 input counter [2 edge count] is as follows.
Up/down counter
At up-counting
At down-counting
At up-counting
Input A phase
+1
Input B phase
19 HIGH-SPEED INPUT/OUTPUT FUNCTION
116
19.1 High-speed Counter Function
ON
OFF
OFF
Up counting
ON
OFF
ON
OFF
Up counting
Counter timing
1 count up when input A phase is ON and input B phase switches OFFON
1 count down when input A phase is ON and input B phase switches ONOFF
+1
Counter timing
1 count up when input A phase is ON and input B phase switches OFFON
1 count up when input A phase is OFF and input B phase switches ONOFF
1 count down when input A phase is ON and input B phase switches ONOFF
1 count down when input A phase is OFF and input B phase switches OFFON
+1
ON
Down counting
Down counting
At down-counting
-1
At down-counting
-1
-1
-1