Falling Edge Output - Mitsubishi Electric MELSEC iQ-F FX5 Programming Manual

Falling edge output

PLF
This instruction turns ON the device specified by (d) for one scan when the PLF command turns from ON to OFF, and turns
OFF in other cases.
Ladder diagram
(d)
FBD/LD
EN ENO
d
Setting data
■Descriptions, ranges, and data types
Operand Remarks
(d) Device to be converted to pulse
EN Execution condition
ENO Execution result
■Applicable devices
Operand Bit
X, Y, M, L, SM,
F, B, SB, S

(d)
*1 T, ST, C cannot be used.
*2 Only the FX5 intelligent function module can be used.
Processing details
• This instruction turns ON the specified device for one scan when the PLF command turns OFF from ON, and turns OFF in
other cases. When there is one PLF instruction programmed for the device specified by (d) during a scan, the specified
device turns ON for one scan.
X5
Sc: 1 scan
• If the RUN/STOP/RESET switch is changed from RUN to STOP after execution of the PLF instruction, the PLF instruction
will not be executed even if the switch is set to RUN again.
6 SEQUENCE INSTRUCTIONS
134
6.3 Output Instructions
Word
T, ST, C, D, W, U\G
SD, SW, R
*1 *2
 
X5 OFF
PLF M0
M0 OFF
Structured text
ENO:=PLF(EN,d);
Range



Double word Indirect
specification
Z LC LZ
   
ON
ON
Sc Sc
Data type Data type (label)
Bit ANY_BOOL
Bit BOOL
Bit BOOL
Constant
K, H E $
  
Others
(DY)
