Experimental Physics and Industrial Control System

Hi:

> Michael Davidsaver <[email protected]>
>http://www.aps.anl.gov/epics/tech-talk/2016/msg01173.php
>Is this what you're looking for?  To write eg. an array of double?

Michael already linked to the basics of writing an array.
The other missing piece might be constructing the plain array in the Jython code.
In your example, you never fetched any column from the table, you just kept writing "i", the scalar loop index, to a PV.
Plus PVUtil.writePV("$(PREFIX):ListVo...) would perform the potentially slow PV connection in the script, i.e. on the UI thread.

Try this:

# Have this script with two PVs attached to the table widget
#
# pvs[0]: Something like loc://do_write_the_column(0), triggering the script execution
# pvs[1]: That array PV to which you want to write the column, NOT triggering the script
from org.csstudio.opibuilder.scriptUtil import PVUtil
from array import array

if PVUtil.getInt(pvs[0]) > 0:
    # Get the table content
    table = widget.getTable()
    content = table.getContent()

    # Get table's column 2 (counting from 0) into col
    col = []
    for row in content:
        col.append(row[2])

    # Write that column as a double[] array to the array PV
    pvs[1].setValue(array(col), 'd')


Now have your button write 1 to loc://do_write_the_column(0)
Note that only the first PV must trigger the script execution, not the second one, because otherwise the script writing to the array PV would trigger the script which writes the array PV which triggers the script to write the array PV etc.

-Kay

On 07/05/2017 04:14 PM, Tomasz Brys wrote:
> Hi,
> I need help.
> I have an OPI BOY. I created a table Nx3, (Nrows, 3 columns), N can be from 1 to 200.
> User can modify the table and when is ready press the button to write the whole column of the table to PV
> The PV is type of aao , size 200. Of course, the table can have less than 200 elements.
> What would be the easiest way to do this?
> I tried something like that, create an Action Button and as an action I execute such a script:
>
> from org.csstudio.opibuilder.scriptUtil import PVUtil
> from array import array
>
> tab = display.getWidget("Table")
>
> row = tab.getTable().getRowCount()
> for i in range(1, row):
>    PVUtil.writePV("$(PREFIX):ListVolt", i)  # - this works but write always one element [0]
>    print i
>
> My question:
> How I can write one column of a table to PV which is type of aao?
> Is it possible to write the whole column at once? Or I have to do it element by element?
> Any help will be appreciated.
>
> Regards
> --
> Tomasz Brys
> Integrated Control System
> European Spallation Source - ERIC
>
>
>

Replies:

Re: help - writing a table column from OPI BOY to PV Tomasz Brys

Re: help - writing a table column from OPI BOY to PV Tomasz Brys

Re: help - writing a table column from OPI BOY to PV Michael Davidsaver

References:

help - writing a table column from OPI BOY to PV Tomasz Brys

Re: help - writing a table column from OPI BOY to PV Michael Davidsaver

Navigate by Date:

Prev: Re: EPICS build system DESTDIR support J. Lewis Muir

Next: Re: EPICS build system DESTDIR support Andrew Johnson

Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  <2017>  2018  2019  2020  2021  2022  2023  2024 

Navigate by Thread:

Prev: Re: help - writing a table column from OPI BOY to PV Michael Davidsaver

Next: Re: help - writing a table column from OPI BOY to PV Tomasz Brys

Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  <2017>  2018  2019  2020  2021  2022  2023  2024