7 Applied Instructions
7.14 Positioning Control
544
FXCPU Structured Programming Manual
(Basic & Applied Instruction)
Function and operation explanation
Cautions about writing during RUN
1) Avoid writing during RUN while ZRN or DZRN is being executed (during pulse output).
(FX
3U, FX3UC, FX3G PLCs.)
If, during pulse output, writing during RUN is attempted in the circuit block including this instruction, it
must be noted that the pulse output slows down and stops.
2) While ZRN or DZRN 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.
DZRN
EN
s1
ENO
d
Label 1
*1
s2
s3
Command
input
Label 2
*2
Device for entering the near-point
signal (DOG)
Device for issuing pulse
*1. The speed when starting to zero return is defined.
*2. The creep speed is defined.
Speed when starting to zero return
ZRN
EN
s1
ENO
d
s2
s3
Device for entering the near-point
signal (DOG)
Command
input
Creep speed
Device for issuing pulse
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