Owner's manual

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