KEYENCE Visual KV Series - Manual (Page 228)

4.1 High-speed Counter Instructions
3-204
Visual KV
Series
4
Chapter 4 High-speed Counters
CTH0: 16-Bit High-
speed counter
CTH1: 16-Bit High-
speed counter
CTC: High-speed
counter comparator
• 16-bit (0 to 65535) up/down counters for
clock pulses with a 30-kHz input 1.
response frequency.
• Can be changed to 24-bit (0 to 16777215)
counters with the MEMSW instruction. 2.
• Enables 30 kHz, two-phase input through
two channels. 1.
• Hardware-based comparator between the
preset value and current value of the
high-speed counter.
• The current value can be changed to a
preset value by external input.
SET
1
CTC
CTH
CTH
RES
0
CTH1
nnnn
CTCn
#ddddd
CTH0
nnnn
2008
0000
CTH0
RES
0500
SET
2103
SET
CTC0
RES
2008
0500
RES
CTC0
0500 T000
#60000
CTC0
#00030
T000
CTH0
0004
HSP
0004
1)
2)
3)
4)
5)
Input-enable relay
4.1 High-speed Counter Instructions
This section describes the CTH0, CTH1, and CTC instructions, which are used for
high-speed counters.
Count input
Example
Coding
Line No. Instruction Operand Line No. Instruction Operand
0000 LD 2008 0009 LD CTC0
0001 HSP 0004 0010 SET 0500
0002 LD 2008 0011 LD 0500
0003 SET 2103 0012 TMR 000 #00030
0004 CON 0013 AND T000
0005 RES CTH0 0014 RES CTC0
0006 LD 0000 0015 CON
0007 CTH0 0004 0016 RES 0500
0008 CTC0 #6000
:
:
:
1. KV-300/Visual KV only
2. Visual KV only
KVNKA Chap 04_1.p65 08.3.11, 0:06 PM 204