KEYENCE Visual KV Series - Manual (Page 197)

2.4 Instruction Details
1
2
3-173 Chapter 2 Instructions
Key operation
Arithmetic flag
2009 Turns ON when the result is "0" after an INC operation, or when the
result is "$FFFF (#65535)" after DEC operation. Turns OFF at other
times.
2010 Turns ON when the internal register is "0" after an INC or DEC opera-
tion. Turns OFF at other times.
2011, 2012 No change
Note: When an every-scan type INC/DEC instruction is used, INC (+1) or DEC (-1)
instruction is executed every scan time while input relay 0000 is ON.
Use a differentiation type instruction (@INC or @DEC) to execute the instruction
only once when input relay 0000 turns ON, as shown in the example.
Tips
When using DM0000 as an UP/DOWN counter
Performs an UP count (addition) when input relay 0000 turns ON.
Performs a DOWN count (subtraction) when input relay 0001 turns ON.
Applications of INC/DEC instructions
■ UP/DOWN count
Performs an UP count when input relay 0000 turns ON.
Performs a DOWN count when input relay 0001 turns ON.
Writes the count value into DM0000.
Reset input relay is 0005.
Coding
0000 DM0000
INC
0001 DM0000
DEC
#00000
LDA
2008
0000
DM0000
STA
0005 #00000
DW
DM0000
INC
0001 DM0000
DEC
DM0000
0000 DM0000
INC
0000 DM0000
INC
Clears DM0000 to #00000 when 0005
turns ON.
Sets #00000 to DM0000 at startup.
Increments DM0000 by 1 at UP edge
of input relay 0000.
Decrements DM0000 by 1 at UP edge
of input relay 0001.
@
#,$
FUN
FUN
@
#,$
FUN
FUN
SET
1
O R
9
L D
7
RES
0
ENT
R-SRCH
ENT
R-SRCH
Operand
ENT
R-SRCH
ENT
R-SRCH
Operand
Line No. Instruction Operand Line No. Instruction Operand
0000 LD 2008 0005 @INC DM0000
0001 LDA #00000 0006 LD 0001
0002 CON 0007 @DEC DM0000
0003 STA DM0000 0008 LD 0005
0004 LD 0000 0009 DW #00000 DM0000
INC / @INC / DEC / @DEC
KVNKA Chap 02_4dP.p65 08.3.11, 0:03 PM 173