213
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
8 Program Flow – FNC 00 to FNC 09
8.9 FNC 08 – FOR / Start a FOR/NEXT Loop
1
In
troduct
io
n
2
Ov
e
rv
ie
w
3
In
st
ru
ct
ion
Li
st
4
D
evi
ce
s
in
De
ta
il
5
Speci
fied t
h
e
D
evi
ce &
C
onst
a
nt
6
Bef
o
re
Pr
ogr
a
m
m
ing
7
Bas
ic
In
st
ru
cti
o
n
8
FNC0
0
-FNC0
9
P
ro
g
ra
m F
lo
w
9
FNC1
0
-FNC1
9
M
ov
e
&
C
om
par
e
10
FNC
20-
FNC
2
9
Ar
ith.
&
Logi
c
O
per
at
io
n
8.9
FNC 08 – FOR / Start a FOR/NEXT Loop
Outline
FOR instruction specifies the number of repetition of the loop between FOR and NEXT (FNC 09) instructions.
1. Instruction format
2. Set data
3. Applicable devices
Explanation of function and operation
→
For the details, refer to NEXT (FNC 09) instruction.
Related instruction
FOR instruction and NEXT (FNC 09) instruction are set as a pair in programming.
Operand type
Description
Data type
Number of repetition of the loop between FOR and NEXT instructions
[
= K1 to K32767]
(A value from
−
32768 to 0 is handled as "1".)
16-bit binary
Oper-
and
Type
Bit Devices
Word Devices
Others
System User
Digit Specification
System User
Special
Unit
Index
Con-
stant
Real
Number
Charac-
ter String
Pointer
X Y M T C S D
.b KnX KnY KnM KnS
T
C
D
R U
\G
V
Z Modify K
H
E
"
"
P
3
3
3
3
3 3 3 3
3
3 3
3
3 3
−
FNC 08
FOR
FOR
Mnemonic
Operation Condition
Mnemonic
Operation Condition
Continuous
Operation
16-bit Instruction
3 steps
32-bit Instruction
S
S
S