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Anne Schukraft, 06/04/2015 03:46 PM

SLC - Guide

Noticing new alarms

Watch the Alarm Tree in the bottom left of the slow control window and check for any new alarms showing up. Note the color coding: "worst case" is an "invalid failure", which is the bright magenta color. If a system in the Alarm Area Panel is already magenta, you will not notice a color change if new alarms appear. Also helpful is the Alarm Table in the bottom right of the slow control standard window. It lists current alarms and you can sort by "Alarm time" to find out what is new.

Getting more information on the alarms

When you do a mouse-over on the alarm in the Alarm Tree, additional information shows up.

Emailing alarms

If you right-click on an alarm in the Alarm Tree, there is an option "Send E-Mail". If you click on this, the alarm information will be automatically pasted into an email, that you can send to yourself/experts. Note that there is a "Screen shot" button in the bottom. If you click this, a screen shot of the current slow control window view will automatically added to the email as an attachment. Very useful!

*For now* we disregard any alarms except OnDetPower_TPCPS. See next point for how to monitor the Low Voltage (LV) on the ASICS and power on the crates.

Checking the status of the Wiener power supplies

If something looks wrong with data taking (for example if you see a lot of quiet channels) this could be a hint that any of the power supplies are off. In order to check their status, click on the button "Open Power Supply Overview Panel" in the overview.opi window. It will show you the Wiener power supplies that we have in the racks on the platform. There is one Wiener for each readout crate, and there is the MPOD in the TPC-PS rack.

Click on "open panel" or "Open HV"/"Open LV" for more information on each power supply. You should see something like the screen shot below. First of all, check that everything is "ON" and green. There is a few exceptions for now, which are "OFF" and should be red. These are all the HV channels and calibration fanout channels in the LV.

The "measured" voltage and current are the actual values for each channel, the "max" voltage and currents in the rows below are the trip values that are set. If a field is framed with a red line, it means the channel has alarmed, because it reached its alarm level or trip level. The alarm level is set lower than the actual trip level. To find out what the alarm level is, right click on the field and select "Show PV Info". If you see a trip, this means the data you are collecting is useless. Call the DAQ expert

How to get the alarm panels back on the screen in case they have disappeared
The third toolbar has buttons "Data Browser", "OPI Runtime", "Alarm" and "OPI Editor". Click on "Alarm" and things should come back. Another option is to in the first toolbar click on "CSS" -> "Alarm" and then "Alarm Area Panel", or "Alarm Tree", etc.