[Dsg-halla_gem] [EXTERNAL] Re: Re: Add an ADC to RPi for gas flows?

[Marc Mcmullen]

Hi Brad,

Steve is correct. I have a softIOC on the Rpi which I use for testing and development. When it is running on the Hall A dev s/n in the EEL the PVs do not get out to the WEDM server. This is probably a security issue with the firewall.

Thanks for adding the PV for the gas analyzer, I’ll pick up the ADC from Jack and discuss this with our group on getting this signal added to the GEM SBS readout.

Are you guys just trying to verify the Ar/CO2 mixture of the gas or are you looking for something in the gas composition?

Regards,
Marc McMullen
Sr. Instrumentation Designer
Detector Support Group
(757) 269-7738

________________________________
From: Brad Sawatzky <brads at jlab.org>
Sent: Saturday, March 5, 2022 11:10:04 AM
To: Stephen Wood <saw at jlab.org>
Cc: Marc Mcmullen <mcmullen at jlab.org>
Subject: [EXTERNAL] Re: [Dsg-halla_gem] Re: Add an ADC to RPi for gas flows?

Makes sense, I was guessing it was something like that.

-- Brad

On Sat, 05 Mar 2022, Stephen Wood wrote:

> Brad:
>
> I think this is the way that Marc wanted it done when it was initially
> set up.   I think it was because he wanted his signals to be visible
> with WEDM and WEDM couldn’t see signals past the accelerator site
> firewall.  (For GEMs not in the Hall.)   Since I was setting up IOCs
> on adaqsc, it was a simple matter to add an IOC to house Marc’s
> signals.
>
> Steve
>
> > On Mar 4, 2022, at 8:08 PM, Brad Sawatzky <brads at jlab.org> wrote:
> >
> > Thanks Steve, found it.  Not that it matters much, but why is the
> > RPi pushing to a softIOC on adaqsc rather than serving the PVs
> > directly from the RPi?  Is it related to the RPi being on a dev
> > subnet?
>
>

--
Brad Sawatzky (he/him), PhD <brads at jlab.org> -<>- Jefferson Lab/ Hall C/C111
Ph: 757-269-5947  -<>-  Fax: 757-269-5235  -<>- Pager: brads-page at jlab.org
The most exciting phrase to hear in science, the one that heralds new
  discoveries, is not "Eureka!" but "That's funny..."   -- Isaac Asimov
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