HiRA-S800 DAQ (adopted from SeGA group)
Contents:
1.
DAQ Startup Sequence
2.
Overview
3.
Particular Setup
4.
Review of Startup Sequence
5.
Troubleshooting
6.
Useful Linux Commands
1. DAQ Startup Sequence:
|
Command Description |
Command |
Recommended Location |
|
1. Start the Scalar Display. |
goscaler |
u6pc2 Desktop 1 |
|
2. Start the elog server. |
goelogserver |
u6pc2 ELOGSERVERHOST |
|
3. Start the Readout
Control |
godaq |
u6pc2 Desktop 1 (*With Scalar Display) |
|
4. Make entries in elog |
elog |
Multiple instances
allowed. |
2. Overview:
Three main computer systems
are being used during an experiment:
- Data Acquisition (1 Computer)
- Control, non-event data logging and monitoring
(2 computers)
- Data Analysis (1 Computer or terminal + remote
computer)
The
data acquisition system is in charge of taking data from the electronics. The computer must be linked to at least one VME
crate by a PCI-to-VME interface and fiber-optic cable. The specific
computer is designated DAQHOST and DAQBOX in the ~/.bash_profile (usually spdaq##). On this computer run: readout, spectrodaq, and evtlogger (all commands begin with godaq command).
The control and monitoring system is in charge of readout control, scalar display, elog clients, and elog servers. The elog server must run always on its designated computer (ELOGSERVERHOST) in the ~/.bash_profile. These computers usually have names such as u#pc# i.e. u6pc2.
Data analysis is performed on a different computer, usually (odan)
3. Particular Setup:
DAQ computer: spdaq20
Location: S800 Vault
Required Processes:
·
readout (Started remotely from ReadoutControl).
·
spectrodaq
·
evtlogger (Started automatically on boot-up).
Online control and
monitoring computers: u6pc2, u6pc3
Location: DataU6
Required Processes:
- elogserver (Make
sure the environment variable, ELOGSERVERHOST, is the computer
running elogserver).
- goscaler
- sclclient,
tclserver (Start
automatically with goscaler)
Please Note:
Any
Computer from which you can connect to the elogserver and make any entries in
the log must be added in the authorized clients list located in ~/elogSync/clients.tcl
4. Review of Startup Sequence:
Start the Scaler Display
with: goscaler
Start the Elog Server with: goelogserver
Start the Readout Control
with: godaq
To make entries in elog,
type: elog
Start SpecTcl with:
gospec_ge
5. Troubleshooting:
|
Nr. |
Symptom(s) |
Possible Cause(s) |
Solution |
|
1 |
The elog is no longer updated at the beginning or
end of the run. |
elogserver died |
Quit and restart elogserver |
|
2 |
DAQ is frozen even with Readout running. |
One of the SpecTcl programs attached online is using
up all the memory pages of spectrodaq. |
On DAQHOST
use bufdump to see if any buffers are coming from the readout.
If you don’t see anything use freepages to check how many free memory pages are left. The
number should be around 2000, anything below 100 is a problem. Kill and restart all SpecTcl instances attached online If trouble persists, reboot
all computers where SpecTcl is attached
and submit a trouble report. |
|
3 |
The Scalar Display shows elapsed run time that
doesn’t appear to increase in a natural way, for example, the first reading
is 100 seconds and after 10 seconds it shows 150 sec or 50 sec. |
Multiple instances of Readout are running on spdaq |
|
|
4 |
Your entries do not appear
in the elog |
|
|
6.Useful Linux Commands:
ps aux | grep name will
list the processes containing the name ‘name’
kill –KILL process_id
will kill the process with the ID process_id
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