[Dsg-hallb_magnets] Cryo-con & PLC Communications

[Nicholas Sandoval]

Hi Brian

The watchdog is taken directly from the NBX module, as such the PLC has no control over the increments or reset limit. 

During Torus commissioning the cryocon error fill was removed from the logic as we did not want to dump the magnet for a comm error.  This logic was replicated in the Solenoid.  The problem appearsto be that the same bit EPICs uses to notify a comm error was also commented out.  

I went ahead and added back the failure bit. Good catch, I will also do the same for Torus/DBX.

Best Regards,

Nick


----- Original Message -----
From: "Ruben Fair" <rfair at jlab.org>
To: "Brian Eng" <beng at jlab.org>
Cc: "dsg-hallb magnets" <dsg-hallb_magnets at jlab.org>
Sent: Thursday, July 20, 2017 5:21:08 PM
Subject: Re: [Dsg-hallb_magnets] Cryo-con & PLC Communications

Brian

I am concerned that the version on Github did not match the version on the PLC. How did this happen?

Ruben

> On Jul 20, 2017, at 5:16 PM, Brian Eng <beng at jlab.org> wrote:
> 
> All solenoid units were upgraded successfully: https://logbooks.jlab.org/entry/3479488
> 
> Nick/Pablo,
> 
> When you guys are back next week we need to look into the status of the cryo-con units on the PLC, as during the upgrade process Tyler and I had to unplug the units several times. The CSS screen comm light for all of the cryo-con units always displayed green. Wesley has already checked into the EPICS part and it looks is okay. I'm not sure if there is a timeout or not, but a few instances we had a unit off for quite a bit of time while troubleshooting.
> 
> Also, the watchdog for the solenoid seem to be increasing in strange increments and it resets itself just shy of 10k.
> 
> Since most of the cryo-con functionality is done with ladder logic I gave up looking into it pretty quickly.
> 
> As a somewhat side note, the current solenoid code needs to be pushed to GitHub, I had to upload from the PLC when I connected since what's on GitHub doesn't match what's on the PLC.
> 
> --
> Brian Eng
> Detector Support Group
> 757-269-6018
> _______________________________________________
> Dsg-hallb_magnets mailing list
> Dsg-hallb_magnets at jlab.org
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