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FX3S/FX3G/FX3GC/FX3U/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
A Programming Tool Applicability and Version Upgrade History
A-1 Programming Tool Applicability
31
FNC277-FNC279
Data
Transfer 3
32
FNC280-FNC289
High-Speed
Processing 2
33
FNC290-FNC299
Extension File
Register Control
34
FNC300-FNC305
FX
3U
-CF-ADP
35
SFC•STL
Programming
36
Interrupt
Function
37
Special Device
38
Error Code
A
Version Up
Information
B
Execution Times
Item Caution
Circuit blooks which require
attention on operation after
writing during RUN
During RUN, avoid writing to a circuit block including the following instructions under execution. If writing is
executed during RUN 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
During RUN, avoid writing to a circuit block including the following instruction under execution. If writing is
executed during RUN to such a circuit block, the PLC immediately stops pulse output.
• PLSV (FNC157) instruction [without acceleration/deceleration operation]
During RUN, avoid writing to a circuit block including the following instruction under execution.
• PLSY (FNC 50), PWM (FNC 58), PLSR (FNC 59) instructions
During RUN, avoid writing to a circuit block including the following instructions under execution of
communication. If writing is executed during RUN 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),
IVMC (FNC275) and ADPRW (FNC276) 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.
• instruction for falling edge pulse
When writing is completed during RUN for a circuit including an instruction for falling edge pulse (LDF,
ANDF, or ORF instruction), the instruction for falling edge pulse is not executed regardless of the ON/OFF
status of the target device of the instruction for falling edge pulse.
When writing is completed during RUN for a circuit including an instruction for falling edge pulse (PLF
instruction), the instruction for falling edge pulse is not executed regardless of the ON/OFF status of the
operation condition device.
It is necessary to set to ON the target device or operation condition device once and then set it to OFF to
execute the instruction for falling edge pulse.
• Instruction for rising edge pulse
When writing is completed during RUN 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)
*2. The PLS instruction is not executed.
When writing to a circuit block during RUN, which includes the following instructions, the following results.
• Pulse instruction during rising edge of operation results (MEP instruction)
After writing to the circuit with MEP instructions during RUN, the MEP instruction result turns ON
(conductive) while the operation results leading up to the MEP instruction are ON.
• Pulse instruction during falling edge of operation results (MEF instruction)
After writing to the circuit with MEF instructions during RUN, the MEF instruction result turns OFF (non-
conductive), regardless of the operation results up to the MEF instruction.
The operation results of the MEF instruction turns ON (conductive) when the operation results leading up to
the MEF instruction are turned OFF.
Other
• When GX Works2 Ver. 1.08J or later or GX Developer Ver. 8.72A or later is used in FX3S/FX3G/FX3GC
PLCs to write data during RUN, the following will occur.
If the number of program steps is reduced by deleting contact or coil application instructions, etc., the
program becomes shorter by the number of reduced steps.
• When GX Works2 Ver. 1.08J or later or GX Developer Ver. 8.18U or later is used in FX
3U/FX3UC PLCs to
write data during RUN, the following will occur.
If the number of program steps is reduced by deleting contact or coil application instructions, etc., the
program becomes shorter by the number of reduced steps.
•FX
3U/FX3UC PLCs Ver. 3.00 or later and GX Works2 Ver. 1.62Q or later.
Writing during RUN is enabled only when the protection status (valid or invalid) by the setting "Read-protect
the execution program" for the block password is same as the protection status of the PLC designated as
the target of writing during RUN.
• Errors cannot be detected in write during RUN even in a circuit which causes errors.
Errors are detected after the PLC is stopped once, and then run again.
While writing is executed
during RUN
Instruction for rising edge
pulse
Instruction for falling edge
pulse
OFF Not executed Not executed
ON
Executed
*1
Not executed
Operation results leading up to
MEP/MEF instruction
MEP instruction MEF instruction
OFF OFF (non-conductive) OFF (non-conductive)
ON ON (conductive) OFF (non-conductive)