Previous Topic

Next Topic

Floating Motor


I/O Points microblock

The Floating Motor microblock is designed to work with an actuator that has a bidirectional motor triggered by two digital signals. For example, "clockwise" and "counterclockwise" or "damper open" and "damper closed."

The microblock converts a "percent open" value from the control program to "on" and "off" signals to two physical digital outputs on the device. The duration of the digital signal controls how long the motor is activated. When correctly calibrated, the duration of the signal is accurately determined by the percentage received by the microblock.

You can assign a name that appears on the face of the Floating Motor microblock; additionally, you can assign names to the two digital points the microblock actually controls.

The Floating Motor microblock tracks the current position of the actuator based on the history of its movement since its last calibration. For example, if the actuator is at 60% open, and the microblock's value is changed to 80%, the motor will be activated for the length of time required to open 20% (80%–60%). In order for this method of control to be accurate, the Full travel time setting on the microblock's dialog must be as accurate as possible.

Properties

Alarm properties

Trend properties

NOTE  Alt+click any value in WebCTRL to view property details, including its expression and editing privilege.