Difference between revisions of "Fast Monitoring System - PXI"

Revision as of 10:10, 31 May 2013

Overview

PXI DAQ Configuration and Channel List

Communication with EPICS

Reboot EPICS Service for ROOTFile Recording

1. Log onto gluon01,
2. Type telnet localhost 26060 to coonect to the service,
3. Hit Ctrl+X to reboot it, reboot it a couple more time to make sure no error messages coming out,
4. Hit Ctrl+] to quit telnet
5. Check ROOTFile recording again

Communication with PLC

How to Run EPICS Control

Start EPICS Control

1. Log onto gluon01.jlab.org using username halld from any Linux terminal, ask Elliott if you do not know the password.
2. Type css & to start the Control System Studio.
3. If PXI control is not already loaded, click File -> Open File in the top left menu, open ~halld/CSS-Workspaces/Default/Hall-D/PXI/PXI_Status.opi.

Use EPICS Control

Make sure that the PXI's heart beat is blinking, and all the EPICS channels are connected

Main Screen

The main screen give you the accesses to PXI control, ROOTFile Recording, strip-charts for CPU usage,magnetic current, field strength, pickup coil signals and buttons to open other strip-charts for sub coil voltages and voltage ratios.

To Start DAQ

1. By default, the PXI-DAQ should be running, if not, hit Start to start the DAQ process, you should see that the status changes from System Standby to Initialize DAQ to DAQ Running

Calculate Offsets

1. Make sure magnet is in a state that the all signals remain zero,
2. Stop running DAQ proccess by hitting Stop,
3. Click zero button to start zeroing process, the status will change from System Standby to Initizalize to Zeroing. After about 1 minute, the zeroing process should automatically stop and System Standby should be shwon then.

Reset Offsets

1. Stop DAQ
2. Click Reset Offset button
3. Start DAQ

Generate Fake Turn-to-Turn Short Alarm

1. The feature only works during a normal DAQ process
2. Click T-2-T Alarm to trigger an alarm
3. Click T-2-T Alarm again to return to disable the fake alarm

Open Strip Charts for Voltage Taps

1. Click Open Sub Coil Chart

Open Strip Charts for Total Voltage and Ratios of Voltages

1. Click Open Voltage Chart button

Start or Stop ROOTFile Recording

1. ROOT Files need to be recorded for offline analysis, start a new ROOTFILE everytime a new ramp up starts from 0 A.
2. Check the status of ROOT File Recording, if it says Idle .. Click to start new file, then click the button, acknowledge the popup message to start a new ROOTFile. The button should then say Writing Data .. Click to stop.
3. Then one need to check the existance of the new file. First log onto gluon01 from a Linux terminal, then type ll -h /local/scratch/PXI_DATA/ROOT/*.root to display the list of availble root list, try to find the file with latest time stamp, also repeat the command a couple of more times make sure the file size is increasing.
4. If ROOT file is not updating, one need to restart the EPICS IOC service for recording.
5. Stop ROOTFile writing by click the button after the current ramps down to 0 A.

How to Analyize ROOT Files

List of ROOT Files

• HallD Elog entry of list of rootfiles
• all the rootfiles are on gluon01.jlab.org in directory /local/scratch/PXI_DATA/ROOT/, there is a symbolic link in the Analyzer directory mentioned later.

Run Analysis Tool

• Log onto gluon01 using username halld.
• Go to directory /home/yqiang/solenoid/Analyzer
• Run ./analyzer

List of button/features in analyzer

• Open: open a rootfile
• Exit: exit the program
• Top Panel: The magnet's current will be shown in the top panel, by zooming in/out the time(X) axis, one will select the range of displays/evaluations shown in the bottom panel
• Bottom Panel: Display of plots, calculations
• Field Delay: Delay time for field probe, default is 0
• Resample Frequency: Show data with different resample frequency, the maximum is 5000 Hz
• Legend: Show legends in plots
• Cal Mean: Calculate mean values of histograms shown in plots, the results will be printed in terminal
• Cal Fit: