Chapter 5 LD Edit
5-1
Chapter 5 LD Edit
LD program displays the PLC program through graphic signals of coils or contact points used in the relay
logic diagram.
5.1 Limit
There are functional limits in LD Program Edit as described below.
Item Description Limit
Maximum contact points Maximum contact points available to input in a line Up to 31
Maximum lines Maximum lines available to edit Up to 65535
Maximum Copy lines Maximum Copy lines available to copy at a time Up to 300
Maximum Paste lines Maximum Paste lines to paste at a time Up to 300
5.2 Program Edit
5.2.1 Edit Tools
The input of LD Edit items shall be started after the input symbols are selected from the LD tool box and the
mouse clicked on the specified position or with applicable Shortcut Key pressed.
Symbol Shortcut key Description
Esc Changes to selection mode
F3 Normally open contact point
F4 Normally closed contact point
Shift + F1
Positive-conversion detection contact
point
Shift + F2
Negative-conversion detection contact
point
F5 Horizontal line
F6 Vertical line
Shift + F8 Connection line
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