[Dsg-hallc_controls] Plan to test Ethernet VS Controlnet

[Brian Eng]

Does Hall C have the equipment to do that sort of test or is that something that will need to be purchased?

Again, I'm not sure what that will tell us since we won't be able to duplicate the setup in the Hall short of buying a complete duplicate of every chassis/module. So the bandwith used by the test-stand won't be able to duplicate the actual PLC.

----- Original Message -----
> From: "Steve Lassiter" <lassiter at jlab.org>
> To: "Brian Eng" <beng at jlab.org>
> Sent: Thursday, June 7, 2018 11:58:45 AM
> Subject: Re: [Dsg-hallc_controls] Plan to test Ethernet VS Controlnet

> Hi,
> 
> The standalone PLC is currently configured with an extra I/O chassis using
> control-net. I suggest adding a third chassis, setup with control-net
> initially. Write some code that uses I/O from all chassis. Then use this setup
> to replace one of the control-net modules with an Ethernet module and run the
> standalone with a mixture of control-net to one external chassis and Ethernet
> to the other chassis. Also, work out the procedure to back out of the Ethernet
> install and replace with the Control-net module, if needed.
> Use this to proof, debug, and do a performance comparison as well as set up a
> work procedure for the task that will be needed down in the hall.
> Then take the Ethernet module(s) and replace one or two of the control-net in
> the SHMS hut and run in this configuration for the fall run. (no idea which
> control net module will fail next as they have all failed only once each).
> 
> Trying to minimize the amount of down time for the effected SHMS I/O chassis and
> the PLC (thus all SHMS magnets) and have a recovery plan in place in case it
> doesn't go well.
> 
> I am looking for proof that the multiple network cards can operate the I/O
> chassis simultaneously and with the nearly the same performance.
> 
> Steven
> ----- Original Message -----
> 
> From: "Brian Eng" <beng at jlab.org>
> To: "Steve Lassiter" <lassiter at jlab.org>
> Cc: "Pablo Campero" <campero at jlab.org>, "dsg-hallc controls"
> <dsg-hallc_controls at jlab.org>
> Sent: Thursday, June 7, 2018 11:36:21 AM
> Subject: Re: [Dsg-hallc_controls] Plan to test Ethernet VS Controlnet
> 
> Hi Steve,
> 
> It's not clear to me what additional procedure you'd like to have other than
> what Pablo included in his initial email.
> 
> Unfortunately there isn't going to be anyway to to test this on the stand-alone
> PLC as it doesn't communicate with any of the other PLCs via ControlNet.
> 
> No matter what the SHMS PLC will need to go offline to change the module out,
> that part is unavoidable.
> 
> Also, I don't know if we can call whatever test we do successful until after the
> PLC is run during beam-on conditions. Since I think everyone is assuming it is
> radiation related that is causing the problems?
> 
> --
> Brian Eng
> Detector Support Group
> 757-269-6018
> 
>> On Jun 7, 2018, at 11:15 AM, Steve Lassiter <lassiter at jlab.org> wrote:
>> 
>> Hi,
>> 
>> Testing, debugging and procedure writeup has to bedone on the standalone unit
>> before applying to the SHMS PLC.
>> 
>> Steven
>> 
>> From: "Pablo Campero" <campero at jlab.org>
>> To: "dsg-hallc controls" <dsg-hallc_controls at jlab.org>
>> Sent: Thursday, June 7, 2018 11:11:37 AM
>> Subject: [Dsg-hallc_controls] Plan to test Ethernet VS Controlnet
>> 
>> Hello Jack, Steve and Mike,
>> 
>> With regards to task #2 of the PLC Tasks list (PLC - Test Ethernet vs ControlNet
>> interface), DSG suggests the swapping of the recent faulted PLC 1756-CN2/B
>> ControlNet by a 1756-EN2T Ethernet module.
>> Faulted ControlNet PLC module is located in the SHMS HX PLC chassis at the Q1
>> rack. This ControlNet PLC module is the one that has presented the most recent
>> communication issues according to the logbook entries.
>> EN2T Ethernet module that is being used now in the Standalone PLC chassis (TED
>> building) can be used for this test; or maybe a new EN2T module, which has an
>> approximate cost of $ 2550 can be ordered.
>> 
>> For the test, the plan would be as follow:
>> • Assign new IP address for the EN2T module on the Hall C subnet.
>> • Swap ControlNet module by EN2T module.
>> • Run/Install Ethernet cable from the EN2T PLC module to available port at Hall
>> C subnet switch.
>> • Modify and configure SHMS PLC program (.ACD file). This action will require
>> SHMS PLC go off line, since the addition of the EN2T hardware module to the PLC
>> project only can be made off-line.
>> • Upload changes in the SHMS PLC program.
>> • Test communications and proper I/O data transfer from HX PLC chassis to SHMS
>> PLC controller chassis.
>> Changes and configurations in the PLC program would not take much longer than 20
>> min.
>> To perform a complete test and verify if the radiation has less affection over
>> the 1756-EN2T PLC module, will be required wait until the next beam run period.
>> 
>> Best Regards,
> > Pablo