
3.CREATING AND EDITING SEQUENCE PROGRAMS B-66234EN/05
- 108 -
3.5.26.1 Setting the maximum number of undo operations.
Procedure
1. Select [Tool]-[Option]. Then click the [Ladder] tab.
2. Move the cursor to [Undo max number], and set the maximum
number of Undo operations. (Range of setting : 0 - 50)
3. Click the <OK> button.
Fig. 3.5.26.1
NOTE
1 This function is effective to the following edit operations.
• Ladder editing in the direct ladder edit screen
(Includes “Change of PMC address by Replace
function”.)
• Addition and deletion of sub-program (P1/P2…) in
program list screen.
2 Undo log is erased by the following operation.
• Changing the “Number of contacts + coil a line”
• Changing the “Method of editing ladder diagram”
• Changing the online mode
• Executing the Decompilation
• Importing the source program
3 There is a case that the operation cannot be canceled
correctly, when the nets which contain the error are
connected.