Mitsubishi Electric MELSEC FX3U Programming Manual page 815

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
Programming complicated transfer conditions
In a transfer condition circuit, ANB, ORB, MPS, MRD and MPP instructions are not available.
Program the circuit as shown below:
1
X004
30
X000 X001
2
X002 X003
31
3
Processing of state relay whose transfer condition is already satisfied
In some cases, it is necessary to execute the next transfer after the limit switch X030 (working as the transfer
condition) in the ON status is set to OFF once, and then set to ON again.
In such a case, make the transfer condition into pulses as shown below so that transfer is not executed by
M100 when S30 turns ON for the first time.
Limit switch
X030
Y000
Change
TRAN
Motor
M
Forward
rotation Y030
35 SFC Program and Step Ladder
1
X004
30
Y000
X000 X001
M0
X002 X003
M0
TRAN
2
31
3
30
PLS
2
X030
PLS
M100 M101
31
35.1 SFC Program
Y030
M100
M101
TRAN
813
31
32
33
34
35
36
37
38
A
B