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Shifter Instructions » History » Version 27

Martin Frank, 01/16/2014 05:09 PM

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h1. NDOS Shifter Instructions
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h2. Starting the Trigger
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*The following instructions show how to start the trigger after you have started a run.*
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*1. The DDTManager should be in the list of managers of the DAQApplicationManager:*
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!ddt_daqapplicationmanager.png!
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*2. You should see the DDT Manager with several buttons in pink (check the whole desktop, this window sometimes hides out of view):*
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!ddtmanager_allstopped.png!
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*3. Click the "Start Group" button to start all of the processes and when they are all running it should look like this:*
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!ddtmanager_allrunning.png!
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4. *If all is well, you should see the DDT Scalars updating in the Trigger Scalars window:*
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5. *When you end a run or when a run crashes, please make sure that you stop all of the trigger processes (see next section).*
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6. *Note that the data-driven triggers record shorter time windows, so you will see very clean events in the Event Display.*
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h2. Stopping the Trigger
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*Make sure that you stop all of the processes after you end a run or after a run crashed!*
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*1. Click the "Stop Group" button and wait until everything is pink (not running).*
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!ddtmanager_allstopped.png!
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h2. Recovering a Trigger
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*Occasionally a trigger process might die, so you can recover it as follows:*
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*1. The overview will indicate this with a bit of pink in the Group button (Group 05 here), so double-click it to see more details:*
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!ddtmanager_onestopped_overview.png!
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*2. Send an email to novaddt@fnal.gov telling us which trigger process died.  For example, trigger process DDT-6-4 died here:*
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!ddtmanager_onestopped.png!
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*3. Right-click on the dead process and click "Start Process":*
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!ddtmanager_restart.png!
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*4. Everything should be green again.  You can return to the Overview by clicking on the orange "Back" button.*
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!ddtmanager_allrunningagain.png!
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*5. If the process dies more than twice in an hour, do not restart it again, but notify us via email.*