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LC4H-W
Operation modes
1. Input mode
Q For the input mode, you can choose one of the following five modes.
? Addition
? Subtraction
? Directive
? Independent
? Phase
UP
DOWN
DIR
IND
PHASE
W After the counter has been reset, setting 2 is displayed in the count-down mode. "0" appears instead in all other modes.
Input mode
Operation
IN1 or IN2 works as an input block
*Minimum input signal width 30 Hz: 16.7 ms; 5 kHz: 0.1 ms
? Example where IN1 is the counting input and IN2 is the input block (gate).
(gate) for the other input.
I N 1
H
L
A A
A A
Addition
UP
I N 2
H
L
Blocked
Counting (addition)
Counting (subtraction)
0
n
1
n-1
2
n-2
3
n-3
n-3
3
n-2
2
n-1
1
n
0
Reset
Count UP
? Example where IN2 is the counting input and IN1 is the input block (gate).
I N 1
H
L
Blocked
A
A
Blocked
A
A
Subtraction
I N 2
H
L
DOWN
Counting (addition)
Counting (subtraction)
0
n
1
n-1
2
n-2
3
n-3
4
n-4
n-1
1
n
0
IN1 is the counting input and IN2 is the
addition or subtraction directive input.
Reset
* “A” must be more than the minimum input signal width.
Count UP
*n: Set value 2
IN2 adds at L level and subtracts at H
level.
I N 1
H
L
Addition
A
A
Subtraction
A
A
Addition
Directive
I N 2
H
L
DIR
Counting
0
1
2
3
4
3
2
1
0
1
2
3
4
Reset
IN1 is addition input and IN2 is subtrac-
* “A” must be more than the minimum input signal width.
*n: Set value 2
Independent
tion input.
I N 1
I N 2
H
L
H
L
IND
Counting
0
1
2
3
4
3
2
1
2 1
2
3
Reset
* IN1 and IN2 are completely independent, so there is no restriction on signal
timing.
Addition when the IN1 phase advances
beyond IN2, and subtraction when the
IN2 phase advances beyond IN1.
I N 1
H
L
Phase
PHASE
I N 2
H
L
Phase advance
B B
Phase retard
Counting
0
1
2
3
2
1
0
Reset
* “B” must be more than the minimum input signal width.
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