Topic: DMD0042

(CONTACT) - Negative Differential

When the assigned bit transitions from ON to OFF, the Negative Differential contact Closes for one complete PLC scan, allowing power flow.  Regardless of the state of the assigned bit, the contacts Open on the following scan, 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 BIT location to use. This can be any readable bit location.

Hotkey: Shift-F3

See Also:

• (CONTACT) - Negative Differential

• (CONTACT) - Positive Differential

Related Topics:

• (CONTACT) - Trailing Edge One Shot

• (CONTACT) - Leading Edge One-Shot

Rung Example: