IDEC FT1A Series User Manual page 104

5: S F
PECIAL UNCTIONS
Counting mode
The high-speed counter as the following four counting modes.
Adding counter (single-phase high-speed counter)
•
The adding counter counts up with the rise in pulse input.
Pulse input
(I0, I2, I3, I5, I6, I7)
10
Current value
Up/down selection reversible counter (single-phase high-speed counter)
•
Up/down selection reversible counter can switch between addition and subtraction by pulse input with the up/down selection
input. When the up/down selection input is on, the counter counts up with the rise in pulse input. When the up/down selection
input is off, the counter counts down with the rise in pulse input.
Up/down selection
input (I1, I4)
Pulse input
(I0, I3)
Current value 10
2-edge count (two-phase high-speed counter)
•
This counter counts by the phase difference between the A-phase and B-phase pulse input. When the A-phase precedes the B-
phase, the counter counts up with the rise and fall of the B-phase. When the B-phase precedes the A-phase, the counter counts
down with the rise and fall of the B-phase.
A-phase
B-phase
Current
0
value
4-edge count (two-phase high-speed counter)
•
This counter counts by the phase difference between the A-phase and B-phase pulse input. When the A-phase precedes the B-
phase, the counter counts up with the rise and fall of the A-phase and the B-phase. When the B-phase precedes the A-phase, the
counter counts down with the rise and fall of the A-phase and the B-phase.
A-phase
B-phase
Current
0 1 2
value
5-16
11
11
1 2 3
3 4 5 6 7
S AXIS P
MART
12
12 11
4 3
8 7 6
/L U ' M FT9Y-B1378
RO ITE SER S ANUAL
13 14
10
2 1
5 4 3 2 1
0
0