Visual kv series, 3 setting and operation of high-speed counters – KEYENCE Visual KV Series User Manual
Page 237
4.3 Setting and Operation of High-speed Counters
3-213
Visual KV
Series
1
4
Chapter 4 High-speed Counters
Double (x2) mode:
Counts up/down based on the phase difference
between two-phase pulse inputs (phase A and
phase B).
Quadruple (x4) mode:
Counts up/down based on the phase difference
between two-phase pulse inputs (phase A and
phase B).
2-pulse method mode: Counts up at the rising edge of phase A and
counts down at the rising edge of phase B.
Count up: Rising edge of phase A
Count down: Rising edge of phase B
Note 1: Use SET-RES instructions to set the special utility relays.
Note 2: When using phase differential input, pulses with a maximum frequency of 30
kHz can be counted, provided the pulses have a duty ratio of 1:1 (50%) and phase
difference of 90°. Inputting pulses with an irregular duty ratio or phase difference will
decrease the allowable input frequency.
When using comparator output from other counters as count input
When relay 0500 is specified as the operand for CTH1, the pulses produced by
CTH0 can be directly output from 0500 to CTH1.
In this case, input relays 0005 (phase A) and 0007 (phase B) for CTH1 can be used
as normal input relays.
3
2
1
0
7
6
5
4
0006
0004
CTH0
0
1
2
3
4
5
6
7
8
OFF
ON
OFF
ON
7 6 5 4 3 2 1 0
15 14 13 12 11 10 9 8
0006
0004
CTH0
0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
OFF
ON
OFF
ON
0006
0004
CTH0
0
1
2
3
4
5
6
5
4
3
2
1
0
OFF
ON
OFF
ON
(Counter value)
(Phase A)
(Phase B)
(Counter value)
(Phase A)
(Phase B)
(Counter value)
(Phase A)
(Phase B)
0500
CTH1
0
1
2
3
4
5
6
OFF
ON
(Counter value)
KVNKA Chap 04_1.p65
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