Mitsubishi 00JCPU User Manual page 270

(2) Operating procedure for performing online change to one file
Select [Tools]
Set a pointer for Write during RUN beforehand.
(a) Setting "After conversion writing behavior" and "Step No. specification used in
writing"
Set them as follows:
1) Select "Write during RUN (while PLC is running)" in "After conversion writing behavior".
2) Select "Absolute step No. (default)" or "Relative step No. by pointer" in "Step No. specification used in
writing".
(b) Performing online change
Display the ladder including the specified pointer and write the changed ladder during RUN.
(3) Precautions
Precautions for online change from multiple GX Developers are the same as those for usual online change.
( Section 6.12.3)
6 - 90
[Options] <Program common> tab in GX Developer.
Figure 6.69 Options screen
1)
2)