5-38
5.3 Output Instructions
5.3.8 Rising pulse and falling pulse outputs
PLS, PLF
(2) If the RUN/STOP key switch is changed from RUN to STOP after the execution of the PLS
instruction, the PLS instruction will not be executed again even if the switch is set back to
RUN.
(3) When specifying a latch relay (L) for the execution command and turning the power supply
from OFF to ON with the latch relay ON, the execution command turns from OFF to ON at
the first scan, executing the PLS instruction and turning ON the specified device.
The device turned ON at the first scan after power-ON turns OFF at the next PLS instruction.
PLF
(1) Turns ON the specified device when the execution command is turned from ON to OFF, and
turns OFF the device in any other case the execution command is turned from ON to OFF
(OFF to OFF, OFF to ON or ON to ON).
When there is one PLF instruction for the device specified for
during one scan, the
specified device turns ON one scan.
Refer to Section 3.10 for the operation to be performed when the PLF instruction for the
same device is executed more than once during one scan.
(2) If the RUN/STOP key switch is changed from RUN to STOP after the execution of the PLF
instruction, the PLF instruction will not be executed again even if the switch is set back to
RUN.
Note that the device specified for
may remain ON for more than one scan if the
PLS or PLF instruction is jumped by the CJ instruction or if the executed
subroutine program was not called by the CALL instruction.
O
p
erat
i
on
E
rror
No operation error occurs in the execution of the PLS and PLF instructions.
PLS
EN ENO
d M0
X
0
X
0 OFF
M0 OFF
ON
PLS
M0
LD
X
0
END
0
END
PLS M0
LD
X
0
END
PLS M0
LD
X
0
CP
U
o
p
eration
sto
p
time
CP
U
o
p
eration
sto
p
time
0
1
scan o
f
PLS M0
ON
O
p
erating t
h
e
R
U
N/STOP key
s
w
itc
h
o
f
CP
U
module
"R
U
N STOP".
O
p
erating t
h
e
R
U
N/STOP
key s
w
itc
h
o
f
CP
U
module
"STOP R
U
N".
O
p
erating t
h
e
R
U
N/STOP
key s
w
itc
h
o
f
CP
U
module
"R
U
N STOP".
O
p
erating t
h
e
R
U
N/STOP
key s
w
itc
h
o
f
CP
U
module
"STOP R
U
N".
d
PLF
EN ENO
d
M0
X5
X5
OFF
M0 OFF
ON
ON
1
scan
1
scan
d
Summary of Contents for MELSEC Q Series
Page 1: ...Structured Programming Manual Mitsubishi Programmable Controller QCPU Common Instructions ...
Page 2: ......
Page 14: ...A 12 MEMO ...
Page 340: ...6 178 MEMO MTR ...
Page 708: ...7 368 MEMO ...
Page 776: ...8 68 MEMO ...
Page 796: ...9 20 MEMO ...
Page 804: ...App 8 MEMO ...
Page 812: ...Index 8 MEMO ...
Page 815: ......