Mitsubishi FX3U Series Programming Manual page 739

FX /FX Series Programmable Controllers
3U 3UC
Programming Manual - Basic & Applied Instruction Edition
4. Inputting and indicating a program using GX Developer
• Input a circuit for setting the initial state relay to ON using the relay ladder.
In this example, the initial state relay S0 is set to ON in a ladder block using the special auxiliary relay
M8002 which turns ON instantaneously when the PLC mode is changed from STOP to RUN.
• When inputting a program using GX Developer, write a relay ladder program to a ladder block, and write an
SFC program to an SFC block.
• Programs expressing operations in state relays and transfer conditions are handled as internal circuits of
the state relays and transfer conditions.
Create each one using a relay ladder.
For the details of programming procedure in GX Developer, refer to GX Developer Operating Manual.
Write a circuit not
belonging to SFC to a
ladder block using a
relay ladder.
Write an SFC program
to an SFC block.
M8002
Ladder block
SFC block
0
1
2
3
4
5
RET
34 SFC Program and Step Ladder
Program for setting the initial state
SET S0
relay to ON
Indicate the state relay number and
transfer condition number.
0
X000
TRAN
Y023
20
Y021
X001
TRAN
Y021
21
Y023
X002
TRAN
22 T0
T0
TRAN
Y023
23
Y021
X003
TRAN
Y021
24
Y023
X002
TRAN
S0
When a program is input using GX Developer,
END
"RET" and "END" are automatically written.
34.1 SFC Program
Input them as
K50
internal circuits.
737
31
32
33
34
35
36
37
A
B
C