KEYENCE Visual KV Series - Manual (Page 149)

2.4 Instruction Details
1
2
3-125 Chapter 2 Instructions
Example
Coding
Description
Use FOR-NEXT instructions in a subroutine program (between SBN and RET) to
initialize data memory (DM0100 through DM0149) when the operation is started.
The indirect addressing method is used to change the data memory, so the initializa-
tion is completed when the TM02 value becomes "50 + 1" between the FOR and
NEXT instructions.
➮ "Indirect addressing" (p. 3-127)
• The FOR instruction takes either of the following two types of operands: the
number of repetitions or the location (DM No.) of the data memory containing the
number of repetitions.
• Define the program to be repeated between the FOR and NEXT instructions.
• The FOR instruction repeats the desired sequence by the specified number of
times during each scan time.
FOR: Repeat Start
NEXT: Repeat End
Executes program between FOR and NEXT
by number of times specified by operand.
Represents end of repetition.
Line No. Instruction Operand Line No. Instruction Operand
0000 LD 2008 0107 FOR #00050
0001 CALL 00 0108 LD 2002
: : 0109 STA #TM02
0099 END 0110 CON
0100 SBN 00 0111 INC TM02
0101 LD 2002 0112 NEXT
0102 LDA #00100 0113 RET
0103 CON :
0104 STA TM02 :
0105 CON :
0106 LDA #00000 0199 ENDH
FUN
FUN
SET
1
ANL
2
O R
9
ORB
6
NEXT
FOR
nnnn
Specify the first DM No.
Specify the number of DMs to be
initialized.
2008
#00100
LDA
2002
2002
00
CALL
END
SBN
00
#00050
FOR
NEXT
RET
ENDH
TM02
STA
#00000
LDA
#TM02
STA
TM02
INC
(DM100)
:
:
FOR / NEXT
KVNKA Chap 02_4bP.p65 08.3.11, 0:00 PM 125