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LC4H-S
Operation mode
1. Input mode
For the input mode, you can choose one of the following five modes
? Addition
? Subtraction
? Directive
? Independent
? Phase
UP
DOWN
DIR
IND
PHASE
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.
IN1
H
L
A A
A A
Addition
UP
IN2
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 completed
? Example where IN2 is the counting input and IN1 is the input block (gate).
Subtraction
IN1
IN2
H
L
H
L
Blocked
A A
Blocked
A A
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 completed
IN2 adds at L level and subtracts at H
level.
IN1
H
L
Addition
A A
Subtraction
A A
Addition
Directive
IN2
H
L
DIR
Counting
0
1
2
3
4
3
2
1
0
1
2
3
4
Reset
* “A” must be more than the minimum input signal width.
IN1 is addition input and IN2 is subtrac-
Independent
tion input.
IN1
IN2
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.
IN1
H
L
Phase
PHASE
IN2
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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