FX3U Series Programmable Controllers
User's Manual - Hardware Edition
82
5 Version Information and Peripheral Equipment Connectability
5.2 Programming Tool Applicability
Item Caution
Circuit blocks which require attention on
operation after write during RUN
Avoid write during RUN to a circuit block including the following instructions
during execution. If write during RUN is executed to such a circuit block, the
PLC decelerates and stops pulse output.
• DSZR (FNC150), DVIT (FNC151), ZRN (FNC156), PLSV (FNC157)
instructions [with acceleration/deceleration operation], DRVI (FNC158) and/
or DRVA (FNC159) instructions
Avoid write during RUN to a circuit block including the following instruction
during execution. If write during RUN is executed to such a circuit block, the
PLC immediately stops pulse output.
• PLSV (FNC157) instruction [without acceleration/deceleration operation]
Avoid write during RUN to a circuit block including the following instructions
during execution of communication. If write during RUN is executed to such a
circuit block, the PLC may stop communication after that.
If the PLC stops communication, set the PLC to the STOP mode once, and
then set it to the RUN mode again.
• IVCK (FNC270), IVDR (FNC271), IVRD (FNC272), IVWR (FNC273),
IVBWR (FNC274) and IVMC (FNC275) instructions
During RUN, avoid writing to a circuit block including the following instruction
under execution.
If such writing is executed during RUN, instructions being executed are
canceled.
• FLCRT (FNC300), FLDEL (FNC301), FLWR (FNC302), FLRD (FNC303),
FLCMD (FNC304) and FLSTRD (FNC305) instructions
When writing to a circuit block during RUN, which includes the following
instructions, the following results.
• Instructions for falling edge pulse
When write during RUN is completed for a circuit including an instruction for
falling edge pulse (LDF, ANDF, or ORF instruction), the instruction for
falling edge pulse is not executed without regard to the ON/OFF status of
the target device.
When write during RUN is completed for a circuit including an instruction for
falling edge pulse (PLF instruction), the instruction for falling edge pulse is
not executed without regard to the ON/OFF status of the device that is set
as the operation condition.
It is necessary to set to ON the target device or operation condition device
once and then set it to OFF for executing the instruction for falling edge
pulse.
• Instructions for rising edge pulse
When write during RUN is completed for a circuit including an instruction for
rising edge pulse, the instruction for rising edge pulse is executed if a target
device of the instruction for rising edge pulse or the operation condition
device is ON.
Target instructions for rising edge pulse: LDP, ANDP, ORP, and pulse
operation type applied instructions (such as MOVP)
*1. The PLS instruction is not executed.
Contact ON/OFF status
(while write during RUN is
executed)
Instruction for
rising edge
pulse
Instruction for
falling edge
pulse
OFF Not executed Not executed
ON
Executed
*1
Not executed
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