5 Basic Instruction
5.11 PLS, PLF
92
FXCPU Structured Programming Manual
(Basic & Applied Instruction)
5.11 PLS, PLF
Outline
When PLS instruction is executed, an applicable device is activated during only one operation cycle after a
drive input turns ON.
When PLF instruction is executed, an applicable device is activated during only one operation cycle after a
drive input turns OFF.
For example, when PLC mode is changed in the way "RUN → STOP → RUN while a drive input remains ON,
"PLS(**, M0) operates, but "PLS (**, M600) (backed up by the battery)" does not operate (when the PLC
mode switches from STOP to RUN) because the status of M600 is latched even while the PLC is in the STOP
mode.
1. Format and operation, execution form
2. Set data
3. Applicable devices
S: Refer to "Cautions".
FX3U(C) FX3G FX2N(C) FX1N(C) FX1S FXU/FX2C FX0N FX0(S)
Instruction
name
Execution
form
Expression in each language
Structured ladder ST
PLS Pulse PLS(EN,d);
PLF Pulse PLF(EN,d);
Variable Description Data type
Input
variable
EN Execution condition Bit
Output
variable
ENO Execution state Bit
Applicable device or variable Bit
Instruction
Bit Devices Word Devices Others
System User Digit Specification
System
User
Special
Unit
Index
Constant
Real
Number
Character
String
Pointer
XY M TCS
D
.b
KnX KnY KnM KnS T C D R
U\G
VZModifier K H E
"
"
P
PLS
z
S1 S2
PLF
z
S1 S2
PLS
EN ENO
d
PLF
EN ENO
d
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