Pls, Plf - Mitsubishi Electric FX3G SERIES Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
7.12

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.
1. Instruction format
PLS
Pulse
PLF
Pulse Falling
2. Applicable devices
Bit Devices
Instruc-
System User
tion
X Y M T C S D .b KnX KnY KnM KnS T C D R U \G
PLS
1
PLF
1
: Except special auxiliary relays (M)
1
2 : This function is supported only in FX
Explanation of function and operation
1. PLS instruction (rising edge pulse)
Circuit program
X000
In the figure above, M0 is ON during only one operation cycle when X000 changes from OFF to ON.
2. PLF instruction (falling/trailing edge pulse)
Circuit program
X000
In the figure above, M1 is ON during only one operation cycle when X000 changes from ON to OFF.
210
Mnemonic
Basic Instruction
−
PLS
Mnemonic
Basic Instruction
−
PLF
Digit Specification
/FX
3U 3UC
List program
0000 LD
PLS M0
0001 PLS M 0
List program
0000 LD
PLF M1
0001 PLF M 1
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
→ For the number of instruction steps, refer to Section 7.15.
Word Devices
Special
System User
Unit
V
PLCs.
Timing chart
X000
PLS
instruction
Timing chart
X000
PLF
instruction
7 Basic Instruction
7.12 PLS, PLF
Others
Con- Real Charac-
Index
stant Number ter String
Z Modify K H E " "
2
2
ON
X000
ON during
one operation
M 0
cycle
ON
X000
ON during
one operation
M 1 cycle
Pointer
P