Mea Hawk - Controls; 4-1 Control Modes; 4-2 Speed and Response Tuning; Intermediate Window

MEA INC
2600 American Lane | Elk Grove Village, IL 60007 | USA
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COMPLETE CONTROL
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MEA Incorporated | Hawk Actuator Instruction and Operation Manual
02/2018 20
4. Controls
4-1 Control Modes
It is important that users familiarize themselves with the functions of each mode of operation. Failure to
understand the actuator operation can result in unexpected performance and an increased chance of
personal injury. For more information on unit installation and start-up refer to Section 5.
Manual
In the Manual mode, the actuator will be under the control of the HMI only and will not respond to a DCS
control signal. This mode provides manual jogging of the actuator for purposes of initial calibration,
hydraulic fluid drain and fill, maintenance, etc.
Control
In Control mode, the actuator receives a desired position signal from the DCS. This signal is compared to
the current position signal provided by the actuator’s position feedback. If the difference between the
desired position and current position exceeds the user defined deadband the actuator will move to the
desired position. The Hawk actuator may be configured to receive 4-20 mA analog control signals or
pulse control signals.
Standby
In Standby mode, the actuator is offline and will not respond to a DCS control signal.
Setup
In Setup mode, the actuator is offline and will not respond to a DCS control signal.
4-2 Speed and Response Tuning
The Hawk speed and response tuning can be configured by the user within the Setup menu.
Intermediate Window
All Hawk actuators operate in two speed modes. A faster speed for large position changes and a slower
speed for fine-positioning. This setting determines the point at which the actuator switches from the
faster to the slower speed and is entered as a percentage of actuator movement.
Run Intermediate
Sets the slower, fine-positioning actuator speed.