Help for LTU Feedback
WARNING: The controls on this screen perform INVASIVE operations.
This Help screen applies to the LTU Feedback The LTU Feedback adjust the BDES of X and Y Corrector Magnet(s) in order to maintain the desired beam position (and angle) at BPMT22. The desired Position ( and Angle) value(s) is set by the operator on this screen. Currently the LTU Feedback is configured to maintain only Position, and uses only one set of X and Y Corrector Magnets.
This screen is arranged in three sections.
SECTION ONE: LTU Feedback Control
This section, across the top of the display, is a duplicate of the controls on the Feedback Control display, and they work the same way. It contains the controls as one line item for the associated longitudinal feedback. Please see the Help... for the Feedback Control display for a description of these indicators and control buttons.
SECTION TWO: Feedback Detail Graphic
This middle Section shows a graphic of the position of the devices used in the LTU Feedback application. The device name is a button which brings up the related device display. There is a square of color that indicates whether the device is currently used in the Feedback. Green means it is in-use, Grey means it is not used. If it is Red or Yellow, then the device or state is in a warning or error condition. See the tabular display below to find if the device or state is operating near or outside of its limits.
SECTION THREE: Tabular Data Display and State Setpoints
This section shows a table of the lower limit, current value, and upper limit on the measurements collected for the LTU Feedback, and the calculated States and Actuator values. When the feedback is on the current values will update continuously. If a device or state is operating near its limits, or out-of-range, the current value will be highlighted with a corresponding yellow or red box around it.
There are two setpoint inputs available in the section for the operator. The operator may change these setpoints 'on-the-fly', the feedback will read the new setpoint on the next iteration. The setpoints are:
X Position: The desired X position in mm.
Y Position: The desired Y position in mm.
Graphs... button
This button brings up a display that contains continuously updating graphs of the Measurements, States, and Actuators for this feedback.