KEYENCE Visual KV Series - Manual (Page 354)

8.2 Details
3-330
8
Chapter 8 Programming Examples
Timing diagram
Ladder diagram
Executes SET when all input relays 0000 to 0003 are ON.
Detects presence/absence of chewing gum packs at DOWN edge of 0000.
Outputs 1-s one-shot pulse from output relay 0500 when 1000 is OFF.
Coding
➮ Refer to p. 3-80.
Applications of SFT instruction
■ Alternating circuit
Every time input relay No. 0000 turns ON, 0500 turns alternately ON and OFF.
Timing diagram
Ladder diagram Coding
➮ Refer to p. 3-82.
0000
1s
0001
0002
0003
0500
0000
1000
SE T
KEEP
1001
RES
0000 1001
DIFD
1001 0500
0500 #00010
T001
T001
0001 0002 0003
1000
Excecutes SET when
all input relays 0000 to
0003 are ON.
Detects presence/absence
of chewing gum packs at
DOWN edge of 0000.
Outputs 1-s one-shot pulse
from output relay 0500
when 1000 is OFF.
0000
0500
1000
1000
D
SFT
0000
2003
1000
CLK
RES
0500
1000
Line No. Instruction Operand Line No. Instruction Operand
0000 LD 0000 0007 DIFD 1001
0001 AND 0001 0008 LD 1001
0002 AND 0002 0009 ANB 1000
0003 AND 0003 0010 OR 0500
0004 LD 1001 0011 ANB T001
0005 KEEP 1000 0012 OUT 0500
0006 LD 0000 0013 TMR 001 #00010
Line No. Instruction Operand
0000 LDB 1000
0001 LD 0000
0002 LD 2003
0003 SFT 1000 1000
0004 LD 1000
0005 OUT 0500
KVNKA Chap 08.p65 08.3.11, 0:12 PM 330