IDEC MICROSmart FC6A Series User Manual page 326

5: F S
UNCTIONS AND ETTINGS
Counting mode
The high-speed counter as the following five counting modes.
■ Adding counter (single-phase high-speed counter)
The adding counter counts up with the rise in pulse input.
Pulse input
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
Pulse input
Current value
■ Dual-pulse reversible counter (single-phase high-speed counter)
This counter switches between the up count and the down count with pulse input (up) and pulse input (down). When a pulse is
input to pulse input (up), the counter counts up with the rise in pulse input. When a pulse is input to pulse input (down), the
counter counts down with the rise in pulse input.
Pulse input (down)
Input
Pulse input (up)
Current value
■ 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
value
5-20
10 11
10 11
10 11
1 2 3
2 3 4 5 6
FC6A S MICROS
ERIES
12
12
12
4 3
7 8 7 6
U ' M
MART SER S ANUAL
13 14
11 10
11 10
2 1
5 4 3 2 1
FC9Y-B1722
0
0