Fixing the SBS DAQ

<<SBS Main

The DAQ will not run and I know nothing about CODA

Figure 1. CODA GUI with ROC information printed at the bottom

Before attempting anything try to reset and start CODA two times. Often this will fix the issues. If CODA is still not working then follow these steps:

• If it is during the work day or you think it will take you more than 15 minutes to troubleshoot this yourself then call the RC immediately instead of following these steps
• First thing is to figure out which DAQ crate is causing the issue
• Look at the CODA GUI (figure 1), and look at the "Severity" information at the bottom
  • Yellow "Warn" messages are fine
  • Red "error" message must be fixed.
• If there are no errors then scroll up, sometimes they are pushed upward before you will notice them.
  • If there are still no obvious errors call a DAQ expert
• Look at the crate name on the left column and determine which crate it is
• At this point if you want to try fixing the DAQ on your own go HERE.
  • Do not do this if it is between 8 am and 10 pm and you think this will take you more than 10 minutes. Call the expert instead.
• Otherwise look at table HERE and call the expert matching that subsystem.

List of crates in the DAQ

CODA ROC Name	Subsystem	Reset Link
ER1, ER2, ER3	CODA Platform	HERE
SEB1, SEB2, SEB3	CODA Platform	HERE
DC1, DC2	CODA Platform	HERE
sbsvtpROC24	SBS GEMs	http://sbsgemcrate02.jlab.org
sbsvtpROC25	SBS GEMs	http://sbsgemcrate02.jlab.org
vtpROC20	BB GEMs	http://hallavme12.jlab.org
hcalvtp1ROC28	HCal	http://hcalvxs1.jlab.org
hcalvtp1ROC29	HCal	http://hcalvxs2.jlab.org
hcalROC16	HCal	http://hcalvxs1.jlab.org
hcalROC17	HCal	http://hcalvxs2.jlab.org
sbsgemROC23	SBS GEMs	None
sbsgemROC22	SBS GEMs	None
grinchROC7	GRINCH	http://grinchvxs.jlab.org
lhrsROC10	LHRS	http://lefthrsvxs.jlab.org
bbgemROC19	BB GEMs	None
bbshowerROC6	BBCal	http://bbshowervxs.jlab.org
bbhodoROC6	BBhodo	http://bbhodovxs.jlab.org
sbsTS21	CODA Platform	HERE

Fixing the DAQ yourself

Almost all issues are fixed by restarting the right crate. Look at the table HERE and determine what subsystem matches the crate error.

• If it is a GEM crate go to GEM Crates
• If it is a different crate follow the reset links on the table above.
• If it is a "CODA Platform" issue then the reset must be through CODA. Go to Fixing CODA Platform Issues

Fixing CODA Platform Issues

• On the adaq@adaq2 desktop look for the folder labeled "SBS_coda_scripts" and open it.

• The following options will appear in front of you. First try clicking on "Restart CODA Components"

• If a CODA component continues being in a red "disconnected" state then instead try "Kill CODA Xterms" and then "Start Xterms".
• If things will still not work then try restarting the platform using the instructions below.

 ssh adaq@adaq2
 sudo systemctl restart platform.service

• Use the "Kill CODA Xterms" button and restart all terminals with "Start Xterms"

• If the DAQ still will not run then try this from any hadesk:

 ssh sbs-onl@eel124gemdaq
 kcoda

• This will kill other processes that may be causing an issue
• The click on the "Restart CODA Components" button

RC GUI is Frozen

Sometime the RC GUI will be frozen and you cannot press any buttons or close it. If that happens then do the following in the terminal:

ps aux | grep ui.rcgui

You will get information in the terminal that looks like the picture below.

Inside the red rectangle is the process ID, which I will call the PID. To kill the GUI then do:

pkill -9 #PID

The GUI should close and then you can open a new GUI using the "CODA RunControl" button without issue.

GEM Crates

Figure 2. Flowchart for fixing the GEM DAQ

The GEMs have many crates and electronics that can cause issues.

• First try resetting the crate following the table above.
• If the issue is more complicated you can follow the GEM documentation HERE
• Look for the flowchart under "Common Problems" (also seen in figure 2).
• If things still do not work, call the GEM expert.