[Dsg-hallb_magnets] IDCCT scaling in labview

[Nicholas Sandoval]

Perfect.  I just made the change in the PLC.  

Thanks,

Nick

----- Original Message -----
From: "Ruben Fair" <rfair at jlab.org>
To: "Tyler Lemon" <tlemon at jlab.org>
Cc: "Nicholas Sandoval" <sandoval at jlab.org>, "dsg-hallb magnets" <dsg-hallb_magnets at jlab.org>, "Probir Ghoshal" <ghoshal at jlab.org>
Sent: Wednesday, January 18, 2017 11:22:17 AM
Subject: Re: IDCCT scaling in labview

Thank you Tyler

R

> On Jan 18, 2017, at 11:21 AM, Tyler Lemon <tlemon at jlab.org> wrote:
> 
> Hello Nick,
> 
> Okay, just IDCCT1 scaling has been changed.
> 
> The changes have been made in the LabVIEW and I will deploy it within the next few minutes. I will then set the modified program as the start-up application. It'll take maybe 15 minutes until the cRIO is back up.
> 
> Best regards,
> Tyler
> 
> From: "Nicholas Sandoval" <sandoval at jlab.org>
> To: "Tyler Lemon" <tlemon at jlab.org>
> Cc: "dsg-hallb magnets" <dsg-hallb_magnets at jlab.org>, "Ruben Fair" <rfair at jlab.org>, "Probir Ghoshal" <ghoshal at jlab.org>
> Sent: Wednesday, January 18, 2017 11:11:56 AM
> Subject: Re: IDCCT scaling in labview
> 
> Hi Tyler,
> 
> Please just scale IDCCT1.  The reason is the PLC DINT data type is limited( -2,147,483,648 to 2,147,483,647).  When we get the DINT in the PLC and the current is over 2,147A it 'freezes'.  
> 
> You can see this behavior in the archive when plotting both IDCCT(I_ZFCT in EPICs) and I_MPS(Danfysik readback) during the high current runs in November. 
> 
> We want to keep the resolution on the voltage taps the same, as we do not get close to this limitation.
> 
> Thanks,
> 
> Nick
> 
> ----- Original Message -----
> From: "Tyler Lemon" <tlemon at jlab.org>
> To: "Nicholas Sandoval" <sandoval at jlab.org>, "dsg-hallb magnets" <dsg-hallb_magnets at jlab.org>, "Ruben Fair" <rfair at jlab.org>, "Probir Ghoshal" <ghoshal at jlab.org>
> Sent: Wednesday, January 18, 2017 10:59:02 AM
> Subject: Re: IDCCT scaling in labview
> 
> Hello Nick, 
> 
> Right now, the way IDCCT1 data is scaled by one million also scales the voltage taps by one million. 
> 
> Do we want the Voltage Taps to stay scaled by one million or should they also be changed to 100,000? 
> 
> Tyler 
> 
> 
> From: "Nicholas Sandoval" <sandoval at jlab.org> 
> To: "Tyler Lemon" <tlemon at jlab.org> 
> Cc: "Ruben Fair" <rfair at jlab.org>, "Probir Ghoshal" <ghoshal at jlab.org> 
> Sent: Wednesday, January 18, 2017 10:40:07 AM 
> Subject: IDCCT scaling in labview 
> 
> Hi Tyler, 
> 
> Can you please change the multiplier for IDCCT1 in the labview logic. I believe it is scaled by a million at the moment, please change it to 100,000. 
> 
> This will prevent us from hitting the hardware limit on the PLC readout. Let me know when you are complete as I will need to do the same in the PLC 
> 
> Thanks, 
> 
> Nick