Mitsubishi Electric MELSEC-Q/L - Rising Edge Output, Falling Edge Output

164
5 SEQUENCE INSTRUCTIONS
5.3 Output Instructions
Rising edge output, falling edge output
PLS, PLF
Processing details
■PLS
• Turns ON the designated device when the execution command is turned OFF  ON, and turns OFF the device in any other
case the execution command is turned OFF  ON (i.e., at ON  ON, ON  OFF or OFF  OFF of the execution
command).
• When there is one PLS instruction for the device designated by (D) during one scan, the specified device turns ON one
scan.
• See Page 122 Operation When the OUT, SET/RST, or PLS/PLF Instructions Use the Same Device for the operation to be
performed when the PLS instruction for the same device is executed more than once during one scan.
• If the CPU module is changed from RUN to STOP state after the execution of the PLS instruction, the PLS instruction will
not be executed again even if the switch is set back to RUN.
• When designating a latch relay (L) for the execution command and turning the power supply OFF to ON with the latch relay
ON, the execution command turns OFF to ON at the first scan, executing the PLS instruction and turning ON the
designated device. The device turned ON at the first scan after power-ON turns OFF at the next PLS instruction.
(D): Pulse conversion device (bits)
Setting
data
Internal device R, ZR J\ U\G Zn Constant Others
DY
Bit Word Bit Word
(D)  
(1) Operating the RUN/STOP switch or RUN/STOP/RESET switch of the CPU module "RUN" to "STOP".
(2) Operating the RUN/STOP switch or RUN/STOP/RESET switch of the CPU module "STOP" to "RUN".
Basic
Process
High
performance
Redundant Universal LCPU
Command
Command
PLF
PLS
D
D
PLS
PLF
X5 OFF
M0 OFF
ON
ON
1 scan 1 scan
X5
M0
PLS
X0
M0PLS
X0 OFF
M0 OFF
ON
PLS M0
LD X0
END0END
PLS M0
LD X0
END
PLS M0
LD X0
0
ON
(1) (2)
(1)
(2)
CPU operation
stop time
CPU operation
stop time
1 scan of PLS M0