QUICK HELP
To completely restart this longitudinal feedback when all is lost...
1) STOP the feedback ---- once stopped you probably have to manually bring beam back ...
2) verify the State Setpoints (and limits) are set to values you want - you can type them in under the Setpoints column.
---The L2 Chirp setpoint (in grey) should be set equal to the L2 Chirp readback at the lower right.
3) verify the Actuator Setpoints (and limits) are set to values you want - you can type them in under the Setpoints column whenever the FCOM column indicates it is OFF.
----You also may want to Update Act Refs at this point
4) ZERO ACTUATOR OFFSETS - button in top section; this sets all the LLRF timeslot offsets to zero for feedback stations L0B, L1S, L2 and L3
5) disable all individual states DL2 Energy, BC2 Energy and Chirp, BC1 Energy and Chirp, DL1 Energy
6) START the feedback - it will display messages as it connects to actuators,
7) enable each state one at a time starting with DL1 Energy - you can watch them start up on the Plots...
Detailed Help for Longitudinal Feedback
WARNING: The controls on this screen perform INVASIVE operations.
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The on-the-fly setpoints can all be used as a vernier to scan around the setpoint.
The on-the-fly setpoints are:
DL1 Energy: The desired Energy for Dog Leg 1, in MeV.
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DL2 Energy: The desired Energy for Dog Leg 2, in MeV. This is most often used as a 'vernier' around the actual DL2 Energy value.
The setpoints that can be changed when the feedback is off are:
L2 Chirp: use this PV when the feedback is inactive, the same as you would the L2 Chirp MeV PV on Joe's display.
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