Keyence Visual KV Series Manuel d'utilisateur 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 e t nuocdeeps - hg i H0HTC1HTCdo i r eP
. oNy a l eR
001200220.1 µs
101210220. 01 µs
201220220. 001 µs
KVNKA Chap 04_1.p65 08.3.11, 0:06 PM210
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