KEYENCE Visual KV Series - Manual (Page 154)

2.4 Instruction Details
3-130
2
Chapter 2 Instructions
Application of SBN-RET and FOR-NEXT instructions
■ Data memory shift
Shifts the contents of the current data memory (DM) to the next DM at the rising
edge of the synchronous (timing) signal. As the number of DMs to be shifted in-
creases, the required scan time becomes longer.
Coding
0000 1000
2002
#00010
LDA
TM03
LDA
TM04
STA
TM02
SUB
TM05
STA
#00001
ADD
2002 TM03
DEC
#TM03
LDA
#TM04
STA
TM04
DEC
TM02
STA
#00030 TM03
LDA STA
00
CALL
1000
DIFU
END
NEXT
SBN
00
FOR
2002 #00000
LDA
#TM02
STA
RET
TM05
ENDH
Synchronous
signal Shift start DM
No. (DM0010)
is designated. Shift end DM
No. (DM0030)
is designated.
Shift level
Indirect addressing is used
to designate DM Nos. Program lines which execute
data shift are grouped as a
subroutine.
Data is shifted from DM0010 to
DM0030.
Shift start DM No. is cleared to
"#00000" after data is shifted.
Line No. Instruction Operand Line No. Instruction Operand
0000 LD 0000 0020 STA TM04
0001 DIFU 1000 0021 CON
0002 CON 0022 SUB TM02
0003 AND 1000 0023 CON
0004 LDA #00010 0024 STA TM05
0005 CON 0025 FOR TM05
0006 STA TM02 0026 LD 2002
0007 CON 0027 DEC TM03
0008 LDA #00030 0028 CON
0009 CON 0029 DEC TM04
0010 STA TM03 0030 CON
0011 CON 0031 LDA #TM03
0012 CALL 00 0032 CON
0013 END 0033 STA #TM04
0014 SBN 00 0034 NEXT
0015 LD 2002 0035 LD 2002
0016 LDA TM03 0036 LDA #00000
0017 CON 0037 CON
0018 ADD #00001 0038 STA #TM02
0019 CON 0039 RET
0040 ENDH
FOR / NEXT
KVNKA Chap 02_4bP.p65 08.3.11, 0:00 PM 130