Falling Edge Output - Mitsubishi Electric MELSEC iQ-R Series Programming Manual

Falling edge output

PLF
RnPCPU RnPCPU
RnCPU RnENCPU
(Process) (Redundant)
When this instruction is used in safety programs executed by the Safety CPU, unless otherwise specified,
replace some words as follows:
• "X5"  "SA\X5"
• "Scan"  "Safety cycle processing"
This instruction turns on the specified device for one scan on the falling edge (on to off) of the execution command.
Ladder
(d)
FBD/LD
EN ENO
d
■Execution condition
Instruction
PLF
Setting data
■Description, range, data type
Operand Description
(d) Pulse conversion target device number
EN Execution condition
ENO Execution result
• In safety programs executed by the Safety CPU, only safety devices and safety labels of data types described in the table
can be used.
■Applicable devices
Operand Bit
X, Y, M, L,
SM, F, B, SB,
FX, FY

(d)
• In safety programs executed by the Safety CPU, only the following safety devices and constants can be used.
Operand Bit
SA\X, SA\Y, SA\M, SA\SM, SA\B

(d)
RnSFCPU RnSFCPU
(Standard) (Safety)
Execution condition
Word
J\ T, ST, C, D, W, U\G, J\,
SD, SW, FD, R, U3E\(H)G
ZR, RD
  
Word
SA\T, SA\ST, SA\C, SA\D, SA\W, SA\SD

ST
ENO:=PLF(EN,d);
Range Data type

Bit

Bit
 Bit
Double word
Z LT, LST, LZ
LC
  
Data type (label)
ANY_BOOL
BOOL
BOOL
Indirect Constant Others
specification (DY)
K, H E $
    
Constant
K, H

5 SEQUENCE INSTRUCTIONS
5.3 Output Instructions
5
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