Re: Support module for PV pre-defined values

["Pueyos, Armando \(DLSLtd, RAL, LSCI\) via Tech-talk" <tech-talk at aps.anl.gov>]

Hi Ulrik,

Yeah, you guessed it. My idea is to implement it as a Python softioc, with more parameters and more flexibility. Just asked here in order to avoid re-inventing the wheel.

Cheers,

    Armando

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From: Ulrik Pedersen <ukp at observatorysciences.co.uk>
Sent: 04 May 2023 12:37
To: Pueyos, Armando (DLSLtd,RAL,LSCI) <armando.pueyos at diamond.ac.uk>
Cc: tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Subject: Re: Support module for PV pre-defined values

 

Hi Armando,

I'm afraid I haven't got a ready-baked solution for this one. However, I have always thought the DLS "positioner" could be implemented quite neatly as a state machine in SNL...?

As an alternative (and arguably more "modern" feel) how about a python softioc? https://github.com/dls-controls/pythonSoftIOC 

Cheers,

Ulrik

On Thu, 4 May 2023 at 11:47, Pueyos, Armando (DLSLtd, RAL, LSCI) via Tech-talk <tech-talk at aps.anl.gov> wrote:

Hello all,

I am trying to find some support module that would allow to store some values and apply these to at least 1 PV from an enum. The idea is to allow end users to defining pre-selected values and apply these to a configured PV or group of PVs on demand. Ideally, something independent of the motor record that can be applied to any existing PV.

As an example, let's imagine a motor-controlled multi-filter with specific positions for each one (e.g. Cu=0, Si=50, Pt=80): the user can drive it to any value within range using a motor record, but also can comfortably select one the positions and command the motion to any of the specific values -- in the example, when selecting "Pt" the motor is commanded to value=80.

FYI, at Diamond we do have a similar one called simply "positioner", but it's quite complex and old for proper maintainability, and thus I am looking for a substitute.

Does anyone know about or have already implemented EPICS support for something like that? Please let me know, any help would be much appreciated.

Many thanks,

    Armando Pueyos

 

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Any opinions expressed within this e-mail are those of the individual and not necessarily of Diamond Light Source Ltd.
Diamond Light Source Ltd. cannot guarantee that this e-mail or any attachments are free from viruses and we cannot accept liability for any damage which you may sustain as a result of software viruses which may be transmitted in or with the message.
Diamond Light Source Limited (company no. 4375679). Registered in England and Wales with its registered office at Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, United Kingdom