AOS Stop/Start Policy

This email describes the official stop/start policy of the TCS subsystem the AOS, and the reset of systems that deliver needed information to the AOS.

Any person has permission to start the AOS subsystem on the mountain, if it is not running.

Check that the AOS is running

The easiest way to see if the AOS is running on the right side is to start the AOS GUI for the right side. On one of the obs# machines:

% AOSGUI right &

This will pop up an AOS GUI. If the background of the window is red, the AOS subsystem is not running.

*Note: if the AOS GUI background is yellow, then there is an inconsistency between the builds of the GUI and the AOS subsystem. ===> In this case, the mountain should be called to find if tests are being performed or if this inconsistency can be fixed. If not, then send an email to the tcsdiscussion@lbto.org with information about the problem.

Starting the AOS subsystem

On one of the obs# machines:

%TCSGUI &

This GUI will display all of the subsystems that are running, and has buttons to start/stop/kill subsystems. If the AOS is not running on the right side, the label to the right of "AOS" will be red and say "Stopped".

*Note, there are several subsystems that must be running before the AOS subsystem can be properly started. These are:

• LSS
• IFF
• ENV
• ECS
• MCS

=> If these subsystems are not already running, the mountain should be called to find if tests are being performed or if these subsystems can be started. If not, then send an email to the tcsdiscussion@lbto.org with information about the problem.

If the above subsystems are running, then the AOS on can be started by clicking the "Start" button to the right of the AOS label. After a few seconds the red "Stopped" should change to black and list the name of the computer where the AOS is running. ===> if this fails, call the mountain for help, or email tcsdiscussion@lbto.org with details.

Once the AOS subsystem is running, the AOSGUI background should change to grey.

Telescope information needed by the AO system

There are three pieces of information needed by the AO system to operate properly:

• Wind information from the 3D AO Anemometer
• Telescope elevation information
• M2 DX swing arm configuration

Wind Information from 3D AO Anemometer:

The wind information comes from the ENV systems, which connects to the AO Anemometer, collects wind information and makes it available to other systems via the Data Dictionary. Currently the wind information is not displayed on the AOS GUI. To see if wind information is being updated, start an ENVGUI from the TCSGUI, click on the Anemometer tab and see if the "Time" entry is changing as well as the x,y,z,r wind values.

If the ENV subsystem is not receiving wind info, or not updating the DD, the AO system will, by default, activate the Thin Shell Safety (TSS) system. This applies 6+ g's of force to the AO thin shell to keep wind from pulling the shell away from the reference body. This is not a dangerous situation, as long as there are no contaminates in the gap. However, it is best to have wind information so the TSS will not be activated unless it is truly needed.

To reset the wind information, two steps are neeeded

Cycle the power to the Anemometer:

• start firefox on one of the obs# machines
• navigate to the dimm power page at dimmpower1.lbt.as.arizona.edu
• login: admin password: (ask TO or Doug Miller)
• click the "off" box for port 3 and then click "Apply"
• wait for the page to refresh
• click the "on" box for port 3 and then click "Apply"

The AO Anemometer power has now been cycled. Check the ENV GUI to see if the "Time" is updating. It will probably not so you need to force the ENV subsystem to re-open a connection to the Anemometer by:

Stop and Start the ENV subsystem

• Click the "Stop" button to the right of the ENV label on the TCSGUI
• Wait for the label to the right of the ENV label to be red and say "Stopped"
• Click the "Start" button to the right of the ENV label on the TCSGUI
• Wait for the label to the right of the ENV label to be black and say "tcs#"

The ENV subsystem has now been restarted. Check that the "Time" is updating on the Anemometer tab on the ENV GUI. ===> if not, call the mountain for help, or email tcsdiscussion@lbto.org with details.

Telescope elevation information:

The easiest place to see the telescope elevation is on the IIF GUI. Thus, from the TCSGUI start the IIF GUI and look in the middle of the GUI where the telescope elevation is displayed. If elevation information is not available, this box will be red. ===> if elevation information is not available, call the mountain for help, or email tcsdiscussion@lbto.org with details.

M2 DX swing arm configuration:

The M2 DX swing arm configuration comes from the OSS subsystem. To check if the swing arm info is available, check the TCS GUI to see if the OSS is running. If not (red label saying "Stopped") then click the "Start" button to the right of the OSS label. It may take a couple minutes for the OSS to fully start up, so be patient.

-- DougMiller - 13 Apr 2011