23
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
1 Introduction
1.1 Programming Language in PLCs
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
1.1.2
Compatibility among programs
All sequence programs created by the above three types are stored in the form of instruction words (contents
as at the time of list program) in the program memory inside the PLC.
• Programs created by these three types of input methods can be converted mutually, and then displayed
and edited as shown in the figure below.
Circuit
SFC
List