Справочник Пользователя для Mitsubishi Electronics FXCPU
6 Step Ladder Instructions
6.1 Step Ladder
99
FXCPU Structured Programming Manual
[Basic & Applied Instruction]
1
O
utlin
e
e
2
Instruc
tion Li
st
3
Configurati
on of
Instruction
4
Ho
w t
o R
ea
d
Explanati
on of
Ins
truction
truction
s
5
B
asic
Instruction
6
Step Ladder
Instruct
ions
7
Ap
pl
ied Inst
ruct
io
io
ns
(Program Flow)
8
Appl
ied
ied
In
stru
cti
cti
ons
(Mov
e and
C
omp
are)
are)
9
App
lie
lie
d Instr
uction
s
s
(Ari
thm
eti
thm
eti
c and
Lo
gic
al O
per
at
ion)
10
App
lied Inst
lied Inst
ructi
ons
ons
(Rot
ati
ati
on and
Shift O
perati
on)
6.1.3
Program examples
Examples of single flows
1. Example of flicker circuit
• When the PLC mode is changed from STOP to RUN, the state relay S3 is driven by the initial pulse
(M8002).
• The state relay S3 outputs Y000. One second later, the ON status transfers to the state relay S20.
• The state relay S20 outputs Y001. 1.5 seconds later, the ON status returns to the state relay S3.
• The state relay S20 outputs Y001. 1.5 seconds later, the ON status returns to the state relay S3.
1 second 1.5 second
Y000
Y001
[Structured ladder/FBD]
[ ST ]
SET(M8002,S3);
STL(TRUE, S3);
Y000:=TRUE;
OUT_T(TRUE, TC0,K10);
STL(TRUE, S3);
Y000:=TRUE;
OUT_T(TRUE, TC0,K10);
SET(TS0, S20);
STL(TRUE, S20);
Y001:=TRUE;
OUT_T(TRUE, TC1, K15);
Y001:=TRUE;
OUT_T(TRUE, TC1, K15);
S3:=TS1;
RET(TRUE);
M8002
Initial
pulse
Y000
S3
STL
EN
ENO
s
SET
EN
ENO
d
S3
Y001
S20
STL
EN
ENO
s
S3
OUT_T
EN
ENO
TC0
TCoil
TValue
TValue
K10
TS0
SET
EN
ENO
d
S20
OUT_T
EN
ENO
TC1
TCoil
TValue
TValue
K15
TS1
RET
EN
ENO
Step
number
0
3
8
11
16
19