Mitsubishi Electric M800VW Series Manual page 473

M800V/M80V Series PLC Development Manual
6 Explanation of Built-in Editing Function (PLC On-board)
6.15 Ladder Menus
[Pasting in overwrite mode]
[Pasting in insert mode]
Restrictions when editing ladders
The following information details restrictions when editing ladders.
 Up to 24 lines can be edited in one ladder block.
 Up to 24 lines in one block and up to 48 lines in total can be edited.
 The maximum number of contacts in one ladder line can be changed with the ladder display setting popup screen.
 The master control (MC) symbol cannot be edited. The MC symbol is displayed during ladder monitoring. (The MC symbol
does not appear during ladder editing.)
 If a series ladder exceeding the maximum number of contacts is created in one line, the line will automatically return and
move to the next line. The return symbol is created with K0 to K99. The OUT (->) and IN (>-) return symbol No. always have
to be the same.
 Another ladder cannot be inserted between the OUT (->) line and IN (>-) line of the return line.
 When writing the ladder, the return symbol is assigned with a serial number even if it is not in the same ladder block. Note
that in the ladder block read out with the read function, the return number is assigned in order from No. 0.
 If the contact and coil to be overwritten extends over several contacts, the ladder cannot be edited with the write (overwrite)
mode.
(Example)
X0 X1
An instruction that uses multiple contacts such as "-[ = D0 D1 ]-" at this
position cannot be overwritten in overwrite mode. (This is because the next
instruction will also be overwritten.)
If the contact and coil to be overwritten extends over several contacts, the ladder cannot be edited with the write
(overwrite) mode.
IB-1501614-B
Y10
448