Topic: DMD0136
DEADBAND - Set Outside Deadband
The Set Outside Deadband (DEADBAND) instruction generates a new Output value only when the Input value differs from the Output value by the Deadband Value. The Deadband value is applied equally above and below the Input Value. A deadband (sometimes called a neutral zone) is an area of a signal range or band where no action occurs. The purpose of a deadband is to prevent oscillation or repeated activation-deactivation cycles.
Parameters:
Note: Use the F9 key or click the 'three dot box' at the right edge of the parameter field to open the Default Element Selection Tool (the Element Picker or the Element Browser) or use the Down-Arrow key (Auto-Complete) on any parameter field to see a complete list of the memory locations that are valid for that parameter of the instruction.
Input - specifies the numeric location with the value to monitor. This can be any readable numeric location.
Deadband - specifies the minimum amount of change allowed before a new output value is generated. This can be any constant value or readable numeric location.
Output - specifies the numeric location to store the new value. This can be any writable numeric location.
Status Display:
When the ladder status is ON (Debug- > All Status On), in addition to the standard status values being displayed, the Set Outside Deadband instruction also displays a small trend that shows the instruction's values graphically. To disable the display of the trend go to the View -> Options menu, select the Ladder tab, then uncheck the Show Trend Status selection.
See Also:
DEADBAND - Set Outside Deadband
INTEGRAT - Integrate Over Time
TIMEPROP - Time Proportional Control
Rung Example:
