892
FX3G/FX3U/FX3GC/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
A Programming Tool Applicability and Version Upgrade History
A-1 Programming Tool Applicability
Cautions on writing during RUN
*1. Circuit blocks cannot be edited to insert a label as shown below when written during RUN.
Item Caution
Program memory which can be written in
RUN mode
Built-in RAM and optional memory cassette (whose write protect switch is set to OFF)
Number of
program steps
which can be
written for
circuit change
in RUN mode
•GX Works2
Ver. 1.08J or later
• GX Developer
Ver. 8.72A or later
•For FX
3G/FX3GC PLCs
256 steps or less after edit (addition/deletion) (including NOP immediately after circuit blocks
except final circuit
•GX Works2
Ver. 1.08J or later
• GX Developer
Ver. 8.24A or later
•For FX3U/FX3UC PLCs Ver. 2.20 or later
256 steps or less after edit (addition/deletion) (including NOP immediately after circuit blocks
except final circuit)
•For FX
3UC PLC earlier than Ver. 2.20
127 steps or less after edit (addition/deletion) (including NOP immediately after circuit blocks
except final circuit)
• GX Developer
Ver. 8.22Y and
earlier
• FX-PCS/WIN(-E)
127 steps or less after edit (addition/deletion) (including NOP immediately after circuit blocks except
final circuit)
Circuit blocks which cannot be written
during RUN
Circuit blocks
*1
in which labels P and I are added, deleted, or changed in edited circuits
Circuit blocks in which 1-ms timers (T246 to T249 and T256 to T511) are added in edited circuits
Circuit blocks in which the following instructions are included in edited circuits
• Instruction to output high-speed counters C235 to C255 (OUT instruction)
• SORT2 (FNC149), TBL (FNC152), RBFM (FNC278) and/or WBFM (FNC279) instructions
I001
FNC 04
EI
FNC 06
FEND
Pointer for
interrupt
Label I is inserted by editing the circuit block
FNC 03
IRET
END
Step
0
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