The instruction how to get the DCS info in the online database.

• You have to work on lxplus.


• Copy Saverio's perl script into your working directory.
  
  > cp ~dauria/public/dcsDBaccess.pl [your director]/.
  
  Saverio sometimes updates his script. Also there are some variety in the scripts. You might want to try something similar to dcsDBaccess.pl.


• To access the popular or basic variables, such as bias voltage/current, module temperature and so on, his script provides easy way to access them. Do
  
  > ./dcsDBaccess.pl -h
  
  for the usage or help.


• This is an example to get module temperature measured on the hybrid.
  
  > ./dcsDBaccess.pl plot 84 00 MOch_Tm0 11-06-2007 09:00 11-06-2007 14:00
  
  You will get a text file named "query_result.txt" in which the module temperature recorded in the database is dumped. The caveat here is that the first and second arguments are the slot and channel of the corresponding HV/LV modules. They are specified in hardware location. The mapping between the hardware location and offline Identifier can be found here.


• If you want to look at the parameters which are not listed in Saverio's perl script as an alias, you have to go through this list to identify the parameter you want to take a look. Then you can do something like:
  
  > ./dcsDBaccess.pl plot 00 00 ATLSCTUSAENV:ELMB/Envr_CANbus_0/Envr_ELMB_D/AI/ELMB_Channel_17.value 09-03-2008 22:00 09-03-2008 23:00 datapoint gnuplot
  
  The second and third argument must be always "00". The fourth argument is the parameter you want to check. The list of parameters is available here.
  
  As of writing of this instruction, there are not complete list or document describing the parameter names. Please ask me, or Saverio and Andree would be the best person to ask.