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Subject: Re: help - writing a table column from OPI BOY to PV
From: Tomasz Brys <Tomasz.Brys@esss.se>
To: "Kasemir, Kay" <kasemirk@ornl.gov>
Cc: "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>
Date: Wed, 12 Jul 2017 14:31:06 +0000
Hi Kay,
The solution which you gave to me, writing column to PV, worked fine. However, there is another problem.
My script is not only to write a one column but there is a little more logic and commands.
And commands run in different order than I expect.

This is my script:
##################################################
from org.csstudio.opibuilder.scriptUtil import PVUtil
from array import array

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

  
    # print content
    # Get table's column 1,2 (counting from 0) into val,dwel
    val =  [float(r[1]) for r in content]
    dwel = [float(r[2]) for r in content]
    
    pvs[6].setValue(1)                         # Reset
    pvs[10].setValue(0)                      # Output off  -- this line makes problem
    pvs[7].setValue(1)                         # clear all lists
    
    if PVUtil.getString(pvs[11]) == 'VOLT':
       pvs[4].setValue(5)                    # set current limit
       pvs[1].setValue(array('d', val))      # write voltage list to device       
       pvs[3].setValue(array('d', dwel))     # set steps
    elif PVUtil.getString(pvs[11]) == 'CURR':
       pvs[5].setValue(5)                    # set voltage limit
       pvs[2].setValue(array('d', val))      # write current list to device
       pvs[3].setValue(array('d', dwel))     # set steps
    
    
    pvs[8].setValue(1)                       # set count
    pvs[9].setValue(1)                       # set direction 
    pvs[10].setValue(1)                      # set output on
    pvs[12].setValue('LIST')                 # set output mode list
##################################################

When I comment the line pvs[10].setValue(0) then everything is OK.
Otherwise, the last command “set output mode list” is before “set output on”.
This is what is printed:
1. Reset
2. Set output off
3. Clear list
4. (assuming ‘volt’) set current limit
5. write voltage list
6. write step list
7. write count
8. set direction
9. set output mode list (missing set output on)
10. (get output)  - this I think is RBV from command 2 
11. set output on 
12. (get current limit) RBV 
13. (get output) RBV

Why is that and what would be the best solution to run it in the proper sequence?

I have to first “set output on” and then “set output mode list” which is actually executing all.
It does not make sense to execute, when output is off….

Regards 
--
Tomasz Brys
Integrated Control System
European Spallation Source ERIC


On 05/07/17:27 17:44, "Kasemir, Kay" <kasemirk@ornl.gov> wrote:

    Hi:
    
    > Michael Davidsaver <mdavidsaver@gmail.com>
    >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 Kasemir, Kay
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
Re: help - writing a table column from OPI BOY to PV Kasemir, Kay

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