Command: Insert Contact

Shortcut: Ctrl+K

Function: The command inserts a contact parallel into the network.

Call: Ladder menu; context menu

Requirements: In the ladder diagram, an insert position for a parallel connection is selected. This is a triangle which points downwards or upwards (, ). Then when you open the menu or context menu, the Insert Contact (parallel) command will be displayed instead of the Insert Contact command.

Symbol: ; in the editor:

Alternatively, you could also select a contact in the ToolBox view and drag it to the ladder diagram. The possible insert positions will be shown there. Release the element at the desired insert position.

A contact passes on the signal (ON or OFF) from left to right until the signal reaches a coil in the right side of the network. For this purpose, a Boolean variable is assigned to the contact. To do this, replace the (???) placeholder above the contact with the name of the variable.

In LD2, you can arrange contacts in both serial and parallel interconnection. In the case of a parallel interconnection, the value ON is passed to the right as soon as at least one contact has the value TRUE. In a serial interconnection, ON is only passed to the right if all contacts have the value TRUE. This is how you program logical connections in LD2.

A negated contact () passes the TRUE signal when the input signal is FALSE. You can use the Negate command to enable or disable negation of an inserted contact.