[Dsg-hallb_magnets] FYI: DSG progress on direct PLC to Cryocon communication

[Brian Eng]

Probir,

We're still investigating the different options right now, so definitely not ready to choose one.

As Nick mentioned none of the setups are quite the same as in Hall B. The one he's using has different controller/firmware/networking and the one I'm using has a different communication (USB & Ethernet) setup.

The main point was to get familiar with how they work so that it will be easier to deploy on the production PLCs when the time comes.



However, it seems quite likely we can remove the 490NBX from the communications path.

> On Mar 13, 2020, at 11:24 AM, Probir Ghoshal <ghoshal at jlab.org> wrote:
> 
> Tyler,
> 
> Could you please suggest the one we need to adopt from your findings as conclusion.
> Regards
> Probir
>  
> From: Dsg-hallb_magnets <dsg-hallb_magnets-bounces at jlab.org> on behalf of Tyler Lemon <tlemon at jlab.org>
> Sent: Friday, March 13, 2020 11:12 AM
> To: dsg-hallb magnets <dsg-hallb_magnets at jlab.org>
> Subject: [Dsg-hallb_magnets] FYI: DSG progress on direct PLC to Cryocon communication
>  
> Hello,
> 
> To keep the mailing list informed, Brian has been looking into Cryo's PLC code distributed by Nick for communicating directly to PLCs with Cryo-con units.
> 
> So far, he's been able to set up and test 2 versions of direct communication: the version from Cryo and a version using Allen-Bradley Add-On-Instruction (AOI) for Modbus.
> 
> Findings so far are that:
> 	• the Cryo version is more involved to get set up and is slower in communication than the delays set in the routine.
> 	• The AOI is quick to set up, but does a lot of extra things that are not wanted or needed.
> Best regards,
> Tyler
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