KEYENCE Visual KV Series - Manual (Page 272)

4.7 Examples of Direct Clock Pulse Output
3-248
Visual KV
Series
4
Chapter 4 High-speed Counters
0000
0000 2205
RES
2205
SET
0000
0000
RES
KEEP
2205
SET
Coding
Note :When the input enable relay for the high-speed counter is used to start/stop
the clock pulse, the response is delayed by a maximum of one scan when output
starts. The response is also delayed by a maximum of one scan when the output
stops.
■ Tips
•
Use special utility relay 2205 to control (enable/disable) the clock pulse output by
external inputs.
• Use the SET-RES pair or KEEP instruction to turn special utility relay 2205 ON/
OFF.
With this setting, the clock pulse is always turned OFF when it starts as well as
stops.
• When either of the following programs is added to the example on the previous
page, the clock pulse is output from 0501 only when 0000 is ON.
When SET-RES instructions are used When KEEP instruction is used
• You can change the period (frequency) of the clock pulse by changing CTC2
preset value using LDA and STA instructions.
To change the period of the clock pulse, refer to "4.3.4 Count Input Method" on
page 3-212.
Line No. Instruction Operand Line No. Instruction Operand
0000 LD 2008 0012 SET 2209
0001 MPS 0013 CON
0002 SET 2203 0014 RES 2210
0003 CON 0015 CON
0004 RES 2204 0016 RES 2211
0005 CON 0017 CON
0006 SET 2205 0018 RES CTH1
0007 CON 0019 LD 2002
0008 RES 2207 0020 CTH 1 2201
0009 MPP 0021 CTC 2 #00050
0010 RES 2208 0022 CTC 3 #00020
0011 CON
KVNKA Chap 04_2.p65 08.3.11, 0:08 PM 248