Mitsubishi Electric FX3G SERIES Programming Manual page 767

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
Programming complicated transfer conditions
In a transfer condition circuit, the 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
Transfer of state relay ON status by the same signal
In some cases, it is necessary to transfer the state relay ON status by the ON/OFF operation of one pushbutton
switch.
To achieve such a transfer, it is necessary to convert the transfer signal into pulses in programming.
The following two methods are available to convert the transfer condition into pulses:
1. Procedure using PLS instruction
Immediately after pulse signal M0 turns ON and S50 turns ON,
the transfer condition M1 (NC contact) is open. As a result, it is
not possible to transfer the ON status to S51 at the same time
when S50 turns ON.
When M0 pulse turns ON again, the ON status is transferred to
S51.
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
Pulse signal
M0
1
50
M1 M0
2
51
M2 M0
3
35.1 SFC Program
Y030
M100
M101
TRAN
TRAN
PLS M1
TRAN
PLS M2
TRAN
765
31
32
33
34
35
36
37
38
A
B