Undo; Clear - Siemens SIMATIC 505 User Manual

Undo

Use Undo to reset networks/addresses in a segment to their original data.
Any modified or inserted rung can be reset. Deleted rungs cannot be
reset.
To access the Undo feature:
1. Select Undo from the Edit menu or press Ctrl+Z.
Result: The Undo Logic window appears (Figure 3.23).
2. Select the segments to reset and press OK, or press Undo All to reset
all networks/addresses displayed.
3. Click Cancel to close the window.
Figure 3.23

Clear

Use Clear to clear an item without removing the space it occupies. Access
Clear from the Edit menu using the Logic Editor in either offline or
online mode. Clear can also be accessed from the Data Window.
To clear items:
1. Select the item or items you want to clear by clicking, holding, and
dragging the pointer over the desired logic.
2. Select Clear from the Edit menu or press the Delete key.
Result: The Clear dialog box appears (Figure 3.24).
3. Click the items you want to clear.
4. Click OK or press Enter.
Result: The selected items are cleared.
Figure 3.24 – Ladder Clear
The following table describes the clearing items.
Item Function
Ladder Removes all networks/addresses from the block displayed.
Network Removes all logic from the network at the cursor position.
Instruction This option is available if the cursor is positioned at an instruction.
When cleared, the instruction is removed; however, attached
branches are not affected.
Branch This option is available if there is a branch to the right of the
instruction with the cursor. Clearing removes the branch to the
right of the cursor.
Row This option is available when an instruction is selected. Clearing
removes instructions from the row where the cursor is positioned.
Branches in this row are cleared only if the resulting logic contains
branches unconnected to logic at one or both ends.
Column This option is available when an instruction is selected. Clearing
removes instructions and branches from the current column.
Logic Editor - Online
Using Clear in the Logic Editor while online works the same as in offline
mode. However, row and column cannot be cleared while online.
3 - 505 SoftShop Basics • • • • 43