iDect FC6A series, User Manual

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5: F
UNCTIONS AND
S
ETTINGS
5-16 FC6A S
ERIES
M
ICRO
S
MART
A
LL
-
IN
-O
NE
T
YPE
U
SER
’
S
M
ANUAL
FC9Y-B1722
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.
■
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.
■
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.
■
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.
■
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.
10 11 12 13 14
Current value
Pulse input
(I0, I1, I3, I4, I6, I7)
10 11 12 11 10 Current value
Up/down selection
input
(I1, I7)
Pulse input
(I0, I6)
10 11 12 11 10 Current value
Pulse input (down)
Input
(I1, I7)
Pulse input (up)
(I0, I6)
0 1 1 0 2 2 3 3 4
B-phase
Current
value
A-phase
0 1 2 3 4 5 6 7 7 6 5 4 3 2 1 0 8
Current
value
B-phase
A-phase