Rockwell Automation 9323-S5500D A.I. SERIES MICROLOGIX 1000 AND PLC-500 SOFTW - Manual (Page 138)

Editing Ladder Logic
6-19
Press [F1] cUrrent to program this structure.
At this point you can edit the rung further or press [F9] aCcept .
Note You can achieve the same result by pressing [A] or [F2] from the first screen shown.
Adding Instructions to a Branch
Append and insert instructions on a branch the same way that you would place them on
a rung. Use [ в в ] to move the cursor to the lower left-hand corner of the branch. From
here, [F3] Append will allow you to place an instruction on the lower leg of the
branch and [F4] Insert will allow you to place an instruction on the upper leg of the
branch.