1. LBT Q1 2009 Eng/SW Review HBSC Hydrostatic Bearing System Sargent/Howard

2. 6-Apr-2009LBT Q1 2009 Eng/SW Review Highlights (Q1/2009) James Howard taking over for Jonathan Kern on HBS James Howard taking over for Jonathan Kern on HBS

3. 6-Apr-2009LBT Q1 2009 Eng/SW Review Open Issues Technical Technical PLC Control law remains unknown, but documentation is available PLC Control law remains unknown, but documentation is available Capillaries installed Capillaries installed Schedule Schedule None None Financial Financial None None Resource Resource Mountain and Tucson support pacing operation Mountain and Tucson support pacing operation

4. 6-Apr-2009LBT Q1 2009 Eng/SW Review Progress (Q1/2009) From last review: From last review: Continue Installation El capillaries at the pads (next week) Continue Installation El capillaries at the pads (next week) Describe new control laws correcting: Describe new control laws correcting: pressure OK pressure OK system shutdown when pocket pressures fail system shutdown when pocket pressures fail control around pressure, not lookup table (LBT) control around pressure, not lookup table (LBT) Rewrite PLC code using new control laws (VoltsDC) Rewrite PLC code using new control laws (VoltsDC) MCSPU software revisions: MCSPU software revisions: Use new CTI PLCIO_rev-4 to communicate with Siemens HPLC Use new CTI PLCIO_rev-4 to communicate with Siemens HPLC Display detailed HBS status in Eng. Interface display page Display detailed HBS status in Eng. Interface display page Add telemetry of HBS tags to MCSPU for diagnostic purposes. Add telemetry of HBS tags to MCSPU for diagnostic purposes. Modify HBS Control/monitor State machine to use newly available tags Modify HBS Control/monitor State machine to use newly available tags Expand and Amend HBS Command set as needed (Q4 ?) Expand and Amend HBS Command set as needed (Q4 ?) MCS needs to copy HBS status info into shared memory for rest of TCS. MCS needs to copy HBS status info into shared memory for rest of TCS. Add HBS information and commands to MCS GUI Add HBS information and commands to MCS GUI

5. More Progress MCSPU is now communicating with the HBS Siemens PLC over ethernet. There are some occasional problems with that and code has been put in the latest rev. of MCSPU to attempt to diagnose and to re-initialize the connection in the event of a comm. failure. MCSPU is now communicating with the HBS Siemens PLC over ethernet. There are some occasional problems with that and code has been put in the latest rev. of MCSPU to attempt to diagnose and to re-initialize the connection in the event of a comm. failure. The Engineering Interface now has 4 new HBS display pages. The Engineering Interface now has 4 new HBS display pages. Work on an HBS GUI as part of the MCS GUI has begun. Work on an HBS GUI as part of the MCS GUI has begun. VoltsDC got WinCC to display temperatures correctly, but that broke the ability to force values, so work continues VoltsDC got WinCC to display temperatures correctly, but that broke the ability to force values, so work continues Conceptual design for a variable capillary is being turned into a prototype, for testing next week. Conceptual design for a variable capillary is being turned into a prototype, for testing next week. Oil temperature – we are starting to understand what temperature to set it to, and how to do it. Oil temperature – we are starting to understand what temperature to set it to, and how to do it. Hysteresis value appears to work, need to determine what value it should be. Hysteresis value appears to work, need to determine what value it should be. 6-Apr-2009LBT Q1 2009 Eng/SW Review

6. 6-Apr-2009LBT Q1 2009 Eng/SW Review

7. 6-Apr-2009LBT Q1 2009 Eng/SW Review

8. 6-Apr-2009LBT Q1 2009 Eng/SW Review Planning (Q2/2009) Continue Installation El capillaries at the pads, possibly with variable capillaries Continue Installation El capillaries at the pads, possibly with variable capillaries Control oil temperature Control oil temperature Set hysteresis value Set hysteresis value Continue coming up to speed on HBS Continue coming up to speed on HBS