Undoing The Last Edit Operation; Editing Statements - Mitsubishi Electric M800VW Series Manual

M800V/M80V Series PLC Development Manual
6 Explanation of Built-in Editing Function (PLC On-board)
6.15 Ladder Menus
Edit files with write-protect passwords configured
If a password to protect against writes or reads/writes has been configured for the edit files, the cancel password screen is
displayed.
Enter the password to cancel the password.
Refer to "6.21 Canceling File Passwords" for information on clearing passwords.

6.15.2.8 Undoing the Last Edit Operation

When editing ladders, you can undo the last edit operation and return the ladder this previous state. This undo operation is
only valid for the last single operation.
Use either of the following methods to execute the undo operation.
 Press the [UNDO] menu key
 Press and hold the Ctrl key and then press the Z key.
The following table describes which edit operations can and cannot be undone.
Operations that can be undone
Editing contacts/coils/lines/etc. (adds/changes/deletes)
Editing statements/notes
Line insertions/line deletions
Pasting in units of ladder blocks

6.15.2.9 Editing Statements

Outline
Statements can be added to the program displayed on the ladder screen.
A statement is text string data added to each ladder block to make it easy to understand the flow of the entire program.
Statements can be edited in accordance with the following restrictions.
Statements
Example display of a statement
When a ladder is changed, the state prior to the change can-
not be restored.
When an unconverted ladder is discarded, the state prior to
discarding cannot be restored.
Editing circuits in the split display
When pasting ladder blocks, the state prior to pasting cannot
be restored.
Input character range
64 single-byte alphanumeric characters Sequence programs
451
Operations that cannot be undone
Storage destination data type
IB-1501614-B