1. K. Luchini LCLS Controls, SLACluchini@slac.stanford.edu July 1, 2005 SLAC Aware IOC EPICS Magnet Functional Requirements Introduction Magnet Functions Displays Database EPICS Channel Access Applications Phase II

2. K. Luchini LCLS Controls, SLACluchini@slac.stanford.edu July 1, 2005 Introduction Alpha, Unix and EPICS IOC Dataflow What will be supported What won’t be supported Later additions after Phase I

3. K. Luchini LCLS Controls, SLACluchini@slac.stanford.edu July 1, 2005

4. K. Luchini LCLS Controls, SLACluchini@slac.stanford.edu July 1, 2005 Supported Magnet Functions Trim – Adjusting DAC to attempt to fit BACT to BDES Perturb – Open loop setting of magnet to the desired B-field used for knobs and changes smaller than TOLS. The ADC is not read. Calibrate – A calibration procedure measures magnet current as a function of DAC setting, and calculates a linear fit used by the other magnet control functions. Standardize – Cycle ps between zero and max current several times, leaving ps at a predefined set point. This restores the magnet to a condition under which its magnet field as a function of current was measured. This allows the magnet to be set reliably to a new desired BDES. Mini-Standardize – Maintain standardization when trimming or perturbing a magnet in a direction opposite to standardization. Move magnet 5% above desired set point and then move magnet in direction of standardization to desired set point. Device cannot be shunted or boosted.

5. K. Luchini LCLS Controls, SLACluchini@slac.stanford.edu July 1, 2005 Supported Magnet functions Zero – Set magnet ps dac to zero. Hardware Knobs – Assign a prim,micr,unit to a knob box and move a the device (perturb) Software Knobs - Allows several magnets to be moved together as a group (perturb) Touchup – Set (pertub) a ps when it is out of tolerance. IACT to IDES – Set desired current to actual current Calibrate Diagnostics - Calibrate function that allows setting of the number of steps and wait time. Additional diagnostic information is returned which the user can display. Degauss – Cycle ps between min and max currents to remove residual field by This can be done for bipolar supplies only. On/Off – Turn power supplies on or off Reset Interlocks – Clear Interlocks

6. K. Luchini LCLS Controls, SLACluchini@slac.stanford.edu July 1, 2005 Unsupported Magnet Functions Check function Diagnostic knobs Direct Module I/O (VME or CAMAC) Control of SLC Magnets (in phase I)

7. K. Luchini LCLS Controls, SLACluchini@slac.stanford.edu July 1, 2005 Displays Monitor only for magnets by sector Monitor & Control for magnets by sector a w/ the exception of SLC controlled magnets. Will be listed but not controllable. All units displays (xcor, ycor, quad, bend, solenoids) Single Unit display Status color coding same as SCP (green, yellow, magenta) Z-Plot B vs. I History – data from Channel Archive and not History Buffers on SLC Bad Units, Lost Standardize, Tripped Units, Bad RMS, Offline Units Diagnostic Displays (decoding status bits in hsta/stat) Diagnostic Calibrate Many but not all standard displays

8. K. Luchini LCLS Controls, SLACluchini@slac.stanford.edu July 1, 2005

9. K. Luchini LCLS Controls, SLACluchini@slac.stanford.edu July 1, 2005

10. K. Luchini LCLS Controls, SLACluchini@slac.stanford.edu July 1, 2005 Database Using SLC High Level Applications requires duplicate DB information in EPICS and SLC. This will be done for the Injector, Linac and BSY. In such cases the EPICS DB will be the considered the master. Save/Restore will be done on EPICS DB. New values for supertype 2 & 3 pushed to SLC DB. Phase I will provide not control of SLC controllable magnets from EPICS Naming convention for EPICS DB : : : Example) QUAD:LM21:201:BDES Naming convention for SLC DB.. Example) QUAD.LM21.201

11. K. Luchini LCLS Controls, SLACluchini@slac.stanford.edu July 1, 2005

12. K. Luchini LCLS Controls, SLACluchini@slac.stanford.edu July 1, 2005 EPICS Channel Access Applications Save/Restore Restore values on boot Gold and Configuration Files Channel Archive Channel Watcher Alarm Handler Strip Tool EDM – EPICS Display Tool CMLOG Matlab

13. K. Luchini LCLS Controls, SLACluchini@slac.stanford.edu July 1, 2005 Phase II Change BDES for SLC controlled Magnet Modeling – XAL KMOD to BDES Steering Correlation Plots Diagnostics Move SLC Controlled Magnets to VME