2 internal clock for high-speed counters, Visual kv series – KEYENCE Visual KV Series User Manual
Page 234
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4.2 Outline of High-speed Counters
3-210
Visual KV
Series
4
Chapter 4 High-speed Counters
4.2.2
Internal Clock for High-speed Counters
•
Each high-speed counter (CTH) is equipped with a dedicated internal clock.
•
To use the internal clock, specify the appropriate relay No. as an operand for the
CTH instruction.
•
The internal clock or external pulses cannot be changed during program execu-
tion.
•
Each clock has the following count period:
High-speed counter internal clock error
•
Absolute error: ± 200 ppm
•
Temperature coefficient: 00
•
Relative error between CTH0 and CTH1: ± 0
r
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0
0
1
2
0
0
2
2
0
.
1
µs
1
0
1
2
1
0
2
2
0
.
0
1
µs
2
0
1
2
2
0
2
2
0
.
0
0
1
µs
KVNKA Chap 04_1.p65
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