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FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
7 Basic Instruction
7.12 PLS, PLF
1
Introduction
2
Overview
3
Instruction
List
4
Devices
in Detail
5
Specified the
Device &
Constant
6
Before
Programming
7
Basic
Instruction
8
FNC00-FNC09
Program Flow
9
FNC10-FNC19
Move & Compare
10
FNC20-FNC29
Arith. & Logic
Operation
3. Caution for simultaneous instances of the ZRST instruction and the PLS instruction
The ZRST instruction resets the last stage for the PLS instruction and PLF instruction of the applicable device. In
addition, the reset state of T and C is also reset.
Please program in the following way to turn on M0 only once.
When the PLC mode is switched in the way "RUN → STOP → RUN" while a drive input remains ON, PLS M600 does
not operate. However, it is possible to operate PLS M600 (latched device) by resetting once using the ZRST
instruction.
Circuit program
M0
X000
M0PLS
M100M0
Timing chart
one operation
cycle
one operation
cycle
ZRST instruction
execution
ZRST instruction
execution
PLS instruction
execution
PLS instruction
execution
X000
M 0
ZRST
Circuit program
M0
X000
M0
M100M0ZRST
RUN STOP RUN
Timing chart
ON during one
operation cycle
ON during one
operation cycle
X000
RUN/STOP
M600
(latched device)
PLS
instruction
Circuit program
X000
M8002
M600PLS
M700M600ZRST