Allen-Bradley Micro800 General Instructions Manual page 45

You can add the following contact element types to your LD program from the
LD Toolbox in Connected Components Workbench.
Contact element
Direct contact on page 46
Reverse contact on page 46
Pulse rising edge contact on page 47
Pulse falling edge contact on page 47
Adding contact elements
Follow these steps to add a contact element to the ladder rung or change the type
of contact used.
Add a contact element
1. Verify the LD program has a defined rung for the contact.
2. From the Toolbox, drag the contact element into the language editor and
Insert a parallel contact
1. From the Toolbox, drag the branch element into the language editor, and
2. From the Toolbox, drag a contact element into the language editor, and
Change the type of contact
In the language editor, select the contact, then press the space bar until the the
contact type you want to use is displayed in the language editor.
Rockwell Automation Publication 2080-RM001D-EN-E - February 2015
Description
Direct contacts support a Boolean operation between a connection line state and a Boolean variable.
Reverse contacts support a Boolean operation between a connection line state and the Boolean negation of a
Boolean variable.
Pulse rising edge (or positive) contacts support a Boolean operation between a connection line state and the
rising edge of a Boolean variable.
Pulse falling edge (negative) contacts enable a Boolean operation between a connection line state and the
falling edge of a Boolean variable.
position it on the rung.
Tip: A plus sign (+) appears on top of a Toolbox element when you hover over a valid target. Release the
mouse button to add the element.
Tip: You can use keyboard shortcut keys to add elements to your LD program. See
page 54.
place it on the existing contact.
place it on the branch.
Ladder Diagram (LD) elements
LD Keyboard shortcuts
Chapter 3
on
45