Experimental Physics and
Industrial Control System

Hi Iain,
> I wish to save some Process Variables to a CSV file, but I
> cannot figure out the code to retrieve the values from the PVs into
> Python.
I think the problem here is that createPV doesn't create the PV
immediately. It takes some time to happen (I guess due to inter-thread
synchronization in CS-Studio). My understanding of the documentation is
that the actual create happens at a rate of 50 Hz (queue run or
something similar in the receiving thread). This means waiting a little
should fix your problem:

pv = PVUtil.createPV(widget.getPV)
time.sleep(0.1)
value = PVUtil.getDouble(pv)

HTH,

Martin

-- 
Martin Konrad
Control System Engineer
Facility for Rare Isotope Beams
Michigan State University
640 South Shaw Lane
East Lansing, MI 48824-1321, USA
Tel. 517-908-7253
Email: [email protected]

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Re: CSS Boy Write PVs to file Kasemir, Kay

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