KEYENCE Visual KV Series - Manual (Page 199)

2.4 Instruction Details
1
2
3-175 Chapter 2 Instructions
Coding
■ Programming technique
Two kinds of instructions can be used for the counting operation: a C (counter)
instruction and an INC instruction with data memory.
The following examples show how to program the total count with each instruction.
As the example of the INC instruction shows, using different instructions sometimes
simplifies the program even for the same control.
Simpler programming reduces the time for debugging.
It is convenient to use the CMP instruction for comparator outputs.
■ OR instruction
Compare the following two programs.
With program 1), input relays 0000 through 0004 are individually counted even when
they turn ON simultaneously.
With program 2), when some input relays 0000 through 0004 turn ON simulta-
neously, duplicated inputs are ignored.
Use the appropriate program according to your application.
Line No. Instruction Operand Line No. Instruction Operand
0000 LD 0000 0011 DW #00000 DM0000
0001 @INC DM0000 0012 LD 2002
0002 LD 0001 0013 LDA DM0000
0003 @INC DM0000 0014 CON
0004 LD 0002 0015 CMP #00100
0005 @INC DM0000 0016 CON
0006 LD 0003 0017 ANB 2009
0007 @INC DM0000 0018 OUT 0500
0008 LD 0004 0019 END
0009 @INC DM0000 0020 ENDH
0010 LD 0005
0005 DM0001
STA
C001
LDA
#09999
0000
C001
DM0002
STA
C002
LDA
#09999
0001
C002
DM0003
STA
C003
LDA
#09999
0002
C003
DM0004
STA
C004
LDA
#09999
0003
C004
DM0005
STA
C005
LDA
#09999
0004
C005
DM0000
STA
DM0005
ADD
DM0004
ADD
DM0003
ADD
DM0002
ADD
DM0001
LDA
2002 $0000
DW
0005
0000
0001
0002
0003
0004
DM0000
INC
DM0000
INC
DM0000
INC
DM0000
INC
DM0000
INC
DM0000
Programming with the INC instruction
with data memory Programming with the C instruction
0000 DM0000
INC
0001 DM0000
INC
0002 DM0000
INC
0003 DM0000
INC
0004 DM0000
INC
0000 DM0000
INC
0001
0002
0003
0004
1) 2)
INC / @INC / DEC / @DEC
KVNKA Chap 02_4dP.p65 08.3.11, 0:03 PM 175