KEYENCE Visual KV Series - Manual (Page 223)

3.4 Applications of Interrupt Programs
3-199
Visual KV
Series
1 3
Chapter 3 Interrupts
0001
0002
0003
0004
0005
0006
0007
0008
0009
0010
2008
EI
2002 HSP
0004
2002 CTH0
0004
# 10000
CTC0
CTH0
RES
0500
SET
2103
SET
2002
0500
RES
0000
END
INT
CTC0
RETI
ENDH
3.4.2 Interrupt with a High-speed Counter
■ Outline
Uses the input value of a high-speed counter from one input relay and the ON/OFF
status of another input relay to control the ON/OFF status of an output relay.
Example: Filling control for medicine (tablets)
■ Ladder diagram
•
Output relay 0500 turns ON when the input value of the high-speed counter from
input relay 0004 reaches "10000".
• Output relay 0500 turns OFF when input relay 0000 turns ON.
Sensor
When power is turned on, an EI
instruction enables interrupts.
Sets automatic reset of CTH0.
Resets current value of CTH0.
ON
OFF
ON
OFF
ON
OFF
ON
Output 0500
Scan
Input 0004
Input 0000
Sets an input time constant of
input 0004 to 10 µs.
Turns OFF output 0500 when
input 0000 turns ON.
Executes an interrupt when the
input value of CTH0 reaches
"10000". Turns ON output 0500.
Specifies CTH0 as the high-
speed counter for input 0004 and
sets "10000" as the preset value
of CTC0.
Visual KV
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