Topic: DMD0041

(CONTACT) - Delta

The Delta contact mimics the behavior of a momentary, normally open relay.

When the state (if a bit location is used) or value (if a numeric location is used) of the assigned element is NOT equal to the state (or value) of that element from the previous scan the contact is Closed, allowing power flow.

When the state (if a bit location is used) or value (if a numeric location is used) of the assigned element is equal to the state (or value) of that element from the previous scan the contact is Open, interrupting power flow.

Parameters:

Note: Use the F9 key (Element Browser) or Down-Arrow key (Auto-Complete) at any time to see a complete list of the memory locations that are valid in the current field of the instruction.

Element - designates the location to monitor. This can be any readable bit location or any readable numeric location.

See Also:

• (CONTACT) - Negative Differential

• (CONTACT) - Positive Differential

Rung Example: