Abstract: There is described a controller and method for managing a flow unit. A measured pressure drop corresponding to a full open position of a flow control element is detected. A calibration pressure drop at full open is established based on the measured pressure drop, and relative pressure drops are calculated based on the calibration pressure drop at full open and calibration pressure drops corresponding to calibration positions of the element. Subsequent to calibration, an operation pressure drop of the flow unit and an operation position of the element are detected. A dynamic nominal is determined based on the operation pressure drop and a particular relative pressure drop corresponding to the operation position. An operation relative flow and a relative flow setpoint are determined based, in part, on the dynamic nominal. The operation position of the flow control element is controlled based the operation relative flow and relative flow setpoint.

Abstract: There is described a controller and method for controlling a flow unit. The controller detects calibration pressure drops of the flow unit, calibration flows of the flow unit, and calibration positions of the flow control element corresponding to the calibration pressure drops and the calibration flows. The controller establishes first calibrations of the flow unit based on the calibration pressure drops and second calibrations of the flow unit based on the calibration flows. The controller detects an operation pressure drop and an operation position of the flow control element. The operation position of the flow control element is controlled based on the operation pressure drop, a particular one of the first calibrations corresponding to the operation position, and a particular one of the second calibrations corresponding to the operation position.

Abstract: There is described a system and method for managing control performance of a field device receiving variable data. Variable and setpoint references corresponding to a control loop of the field device are identified. A time delay normal period based on expected oscillations of the variable reference and settling limits associated with the setpoint reference are also identified. An offnormal timestamp is generated based on the variable reference relative to one or more second pre-settling limits associated with the setpoint reference. A normal timestamp is generated based on the variable reference relative to the settling limits. A settling time of the control performance is determined based on the normal timestamp, the offnormal timestamp, and the time delay normal period. One or more performance features of the field device are modified based on the determined settling time.

Abstract: There is described a controller and method for managing a flow unit. A measured pressure drop corresponding to a full open position of a flow control element is detected. A calibration pressure drop at full open is established based on the measured pressure drop, and relative pressure drops are calculated based on the calibration pressure drop at full open and calibration pressure drops corresponding to calibration positions of the element. Subsequent to calibration, an operation pressure drop of the flow unit and an operation position of the element are detected. A dynamic nominal is determined based on the operation pressure drop and a particular relative pressure drop corresponding to the operation position. An operation relative flow and a relative flow setpoint are determined based, in part, on the dynamic nominal. The operation position of the flow control element is controlled based the operation relative flow and relative flow setpoint.

Abstract: There is described a controller and method for managing a flow unit. A measured full flow corresponding to a full open position of a flow control element of the flow unit is detected. A calibration nominal is established based on the measured full flow, and calibration relative flows are calculated based on the calibration nominal and calibration measured flows corresponding to calibration positions of the flow control element. Subsequent to calibration, an operation measured flow of the flow unit and an operation position of the flow control element are detected. A dynamic nominal is determined based on the operation measured flow and a particular calibration relative flow corresponding to the operation position of the flow control element. The operation position of the flow control element is controlled based on the operation measured flow and the dynamic nominal.

Abstract: There is described a controller and method for managing a flow unit. A measured full flow corresponding to a full open position of a flow control element of the flow unit is detected. A calibration nominal is established based on the measured full flow, and calibration relative flows are calculated based on the calibration nominal and calibration measured flows corresponding to calibration positions of the flow control element. Subsequent to calibration, an operation measured flow of the flow unit and an operation position of the flow control element are detected. A dynamic nominal is determined based on the operation measured flow and a particular calibration relative flow corresponding to the operation position of the flow control element. An operation relative flow and a relative flow setpoint are determined based, in part, on the dynamic nominal. The operation position of the flow control element is controlled based the operation relative flow and relative flow setpoint.

Abstract: There is described a controller and method for managing a flow unit. A measured full flow corresponding to a full open position of a flow control element of the flow unit is detected. A calibration nominal is established based on the measured full flow, and calibration relative flows are calculated based on the calibration nominal and calibration measured flows corresponding to calibration positions of the flow control element. Subsequent to calibration, an operation measured flow of the flow unit and an operation position of the flow control element are detected. A dynamic nominal is determined based on the operation measured flow and a particular calibration relative flow corresponding to the operation position of the flow control element. An operation relative flow and a relative flow setpoint are determined based, in part, on the dynamic nominal. The operation position of the flow control element is controlled based the operation relative flow and relative flow setpoint.

Abstract: There is described a system and method for managing control performance of a field device receiving variable data. Variable and setpoint references corresponding to a control loop of the field device are identified. A time delay normal period based on expected oscillations of the variable reference and first settling thresholds associated with the setpoint reference are also identified. An offnormal timestamp is generated based on the variable reference relative to one or more second settling thresholds associated with the setpoint reference. A normal timestamp is generated based on the variable reference relative to the first settling thresholds. A settling time of the control performance is determined based on the normal timestamp, the offnormal timestamp, and the time delay normal period. One or more performance features of the field device are modified based on the determined settling time.

Abstract: There is described a system and method for managing control performance of a field device receiving variable data. Variable and setpoint references corresponding to a control loop of the field device are identified. A time delay normal period based on expected oscillations of the variable reference and settling limits associated with the setpoint reference are also identified. An offnormal timestamp is generated based on the variable reference relative to one or more second pre-settling limits associated with the setpoint reference. A normal timestamp is generated based on the variable reference relative to the settling limits. A settling time of the control performance is determined based on the normal timestamp, the offnormal timestamp, and the time delay normal period. One or more performance features of the field device are modified based on the determined settling time.