Alarm Handler
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PREX Main<< Information for Shift Takers << Shift Leader
Experimental Python Alarm Handler
The new python alarm handler lives (for now) in a SBU JLab GitHub Repository
Start a new instance
From within the apar account, execute the ~/bin/ command
AlarmHandler
Hall A/Target Alarm Handler
Start a new instance of the Hall A Alarm handler
- From the EPICS control computer (hacweb7), click on the red toolbox in the lower left corner (see Figure 1)
- Click on "AlarmHandler" in the popup menu
- The window shown in Figure 2 should appear
- Move the alarm handler window to the upper right of the screen
- Pin the window to all of the desktops
- Click on the "AlarmHandler" in the upper left corner
- Mouse over "To Desktop"
- Choose "All Desktops" at the top of the drop down menu
- Open the Current Alarm History
- Click the "View" context menu and select "Current Alarm History Window"
- This is most useful for getting detailed information about timing and values of alarms as they accumulate
- Information about alarms is also accessible by double clicking on items in the right half-panel
- Please feel free to make strip charts out of any interesting EPICS variables that you find in the Alarm Handler or other GUIs. See Strip chart for more information.
- If an alarm is white then it is a communications failure from an EPICS Input/Output controller (IOC) and should rectify itself in a minute or less (otherwise call the RC)
- If an alarm is red it means that some important parameter is out of range
- Please keep track of the set points and current value of anything that alarms, and if the alarm isn't transient and trivial please make a HALOG entry about it
- If the alarm continues for more than a few seconds please try to understand the nature of the issue and contact the RC or other nearby experts if it isn't immediately clear how to resolve it
Start a new instance of the Target Alarm Handler
- Make sure the target gui is running on the poltarac computer
cd ~/Desktop/PRex ./tgtgui Select the ALARMS button
- It should be similar to the Hall A alarm handler, but with difference tracked EPICS variables
Responding to an alarm
- Click on the alarm handler window in the upper right of the hacweb7 monitor (see Figure 2)
- This will open a window that lists the various pieces of equipmen (see Figure 3)