Mitsubishi Electric M800VW Series Manual page 474

M800V/M80V Series PLC Development Manual
6 Explanation of Built-in Editing Function (PLC On-board)
6.15 Ladder Menus
 If a return results from the insertion of a contact in the first row of the ladder, the contact cannot be inserted.
(Example)
X0 X1
A contact or row cannot be inserted at the first row of the ladder.
(Insertion is possible if the second and following rows are empty and
the insertion will not result in a return code.)
 Insertion of the ladder symbol is processed by right alignment and row insertion, so there may be causes when the symbol
cannot be inserted because of the ladder shape.
(Example)
X0
X1
(a)
Note
(1) The position (b) is the closest position to the cursor position among the branch symbols and the coil-equivalent
instructions.
 If one ladder block has two or more lines, and the instruction does not fit on one line, enter a new line before entering the
instruction.
 Create the number of steps for one ladder block within approximately 4k steps. The NOP instruction in the ladder block is
also included in the number of steps. The NOP instruction between ladder blocks is irrelevant.
 If there is an unconverted ladder, the screen movement range may be limited.
X2 X3 X0A
(c)
X2 X3
(b)
Cursor position
Y10
If inserting a ladder symbol at position (a), and the
following conditions are satisfied, the "Edit position
is incorrect." error message displays and the
ladder cannot be inserted:
No spaces between (a) to (b)
Insertions cannot be made into the (c) column.
449 IB-1501614-B