Re: question of data conversion

[Ralph Lange <Ralph.Lange@gmx.de>]

On June 27, 2016 1:59:40 PM GMT+02:00, Remi Faure <remi.faure@lpsc.in2p3.fr> wrote:

Hi again,

I Tested ASLO and AOFF without success with LINR=LINEAR.
I changed LINR=SLOPE, now it works fine.

Thank you for quick help!

Remi FAURE


Le 27/06/2016 à 12:32, bob dalesio a écrit :

And set LINR appropriately. 

This chapter of the Record Reference Manual are also appropriate:

On Mon, Jun 27, 2016 at 5:32 AM, Ralph Lange <ralph.lange@gmx.de> wrote:

Hi Remi,

Have a look at the "Convert and Write Parameters" section of the ao record documentation at

https://wiki-ext.aps.anl.gov/epics/index.php/RRM_3-14_Analog_Output#Convert_and_Write_Parameters

LOPR/HOPR are giving hints about the expected value range to applications, they do not affect conversion.
You should use EGUL/EGUF or ESLO/EOFF.

Cheers,
~Ralph

On 27/06/2016 10:40, Remi Faure wrote:

Hi,

I have a simple question. All the examples I found about EPICS data convertion starts from raw value (DAQ) to engineering unit value.

I don't arrive to make the opposite in a simple way. I want to write a numerical data from CSS boy to an output value of a plc.

For instance I tried a longout or ao record , wich is passing directly the 0/4095 value correctly. When I try to pass a 0/100% value and try convert it in 0/4095 with LOPR, HOPR fields it fails.

In attachement a simple drawing of what I want to make here.

Thank you in advance for help.

Remi FAURE

LPSC Grenoble

Should be ESLO and EOFF, though. (See documentation.)

Cheers,
~Ralph