7 Applied Instructions
7.14 Positioning Control
548
FXCPU Structured Programming Manual
(Basic & Applied Instruction)
Function and operation explanation
Cautions about writing during RUN
1) Avoid writing during RUN while PLSV or DPLSV is being executed (during pulse output).
(FX3U, FX3UC, FX3G PLCs)
If, during pulse output, writing during RUN is attempted in circuit block including this instruction, it must be
noted that the pulse output becomes as follows.
*1. Only available for FX
3U/FX3UC PLC Ver.2.20 or later and FX3G PLC.
2) While PLSV or DPLSV is being executed, the following writing during RUN is prohibited.
(FX
1S, FX1N, FX1NC PLCs.)
Program change of circuit block including this instruction.
Program change of circuit block immediately before or immediately after the circuit block including this
instruction.
Addition or deletion of circuit block immediately before or immediately after the circuit block including this
instruction.
Function changes by version
This instruction includes the function changes as shown in the table below depending on the version.
→ As for the explanation of the instruction and contents of function changes, refer to the positioning
control manual.
FX
1N, FX1NC, FX1S are not applicable to this function.
Operation when written during RUN while instruction
is being executed
When operating with
acceleration or deceleration
*1
Pulse output slows down and stops.
When operating without
acceleration or deceleration
Pulse output stops immediately.
Corresponding version
Added function Outline of function
FX3G FX3U FX3UC
Ver. 1.00
or later
Ver. 2.20
or later
Ver. 2.20
or later
Acceleration or
deceleration
operation function
When M8338 is turned ON, the operation accelerates or decelerates up to
by setting of acceleration time or deceleration time corresponding to
when is changed.
PLSV
EN
s
ENO
d1
d2
Device for issuing pulse (Y)
Command
input
Output pulse frequency
Device of rotating direction signal
DPLSV
EN
s
ENO
d1
d2
Command
input
Label
(Output pulse frequency
is defined.)
Device for issuing pulse(Y)
Device of rotating direction signal
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