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aidaget LINAC//XCOR:BDES -DMICROS=LI10-LI10 -DUNITS=1-9999 XCOR:LI10:200 0.0 XCOR:LI10:201 0.0 XCOR:LI10:202 0.0 ... |
Getting data from a number of
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devices at a time.
You can use aidaget in a standard unix pipe to Combining a file of device names, or aidalist with a unix pipe, you can get a number of values at a time. Combined with the xargs unix command you can for instance get all the values of devices in a file, or as output from aidalist. For instance, get the Twiss parameters from the online model, of all the devices in a file. Say your devices were listed in a file (eg checkDevices27Oct2008.txt_Aida_NO), then you can get their values like this:
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[tersk02]:u/cd/greg> cat checkDevices27Oct2008.txt_Aida_NO | xargs -I {} -t aidaget "{}//twiss" -DMODE=5
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The -t says echo what you're about to execute before executing it.
You can use output of aidalist directly to get values of a number of devices.
Combine aidalist with caget:
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aidalist BPMS:LI27:%:X1 | xargs -I{} caget {} BPMS:LI27:201:X1 -0.210293 BPMS:LI27:301:X1 0.0417948 BPMS:LI27:401:X1 0.246912 BPMS:LI27:501:X1 -0.252207 BPMS:LI27:601:X1 -0.699057 BPMS:LI27:701:X1 0.00149554 BPMS:LI27:801:X1 0.161638 BPMS:LI27:901:X1 -0.086897 |
This example gets the twiss of all the XCORs in LI22. Note, we use the 2 argument form of aidalist to confine the the output to just the twiss attribute (rather than all the PVs of all the XCORs in LI22), then we select only the forst column of output (the device names), then call aidaget with is the device name and '//twiss' appended:
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aidalist XCOR:LI22:% twiss | awk '{print $1}' | xargs -I {} -t aidaget "{}//twiss" -DMODE=5
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Setting Value: aidaset
The utility program named "aidaset" takes at least two mandatory arguments (the name of the target and the desired value), and several optional parameters control how it operates.
An AIDA data provider that supports setting values will accept either a single scalar or vector value, or a list of named scalar or vector values. The EPICS channel access data provider is of the former sort, and the SLC Magnet server is of the latter.
NB: Presently, only the EPICS Channel Access and SLC Magnet data providers support write operations.
An example of setting a scalar EPICS process variable:
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