[Dsg-hallc_controls] NMR - PLC Interface

Brian Eng beng at jlab.org
Fri Jun 8 13:05:06 EDT 2018


Since there is currently no direct way to interface the new NMR with the PLC (MODBUS would work, but is at least 1 year away according to the vendor) and none of the existing devices used by Halls B/D will work we're going to need to develop something ourselves.

Despite the communication issues discovered with the NMR (that the vendor is aware of and working on) the proof-of-concept of using Python modules as a go between the devices showed it could be a viable solution.

The next step would be to order the hardware that would run this. The plan is to use a small SBC that runs Linux, I was hoping to order through webstock but I couldn't find any newer models. So we would need to use a PCard for the order.

Each board/setup would be ~$70 and we'd like to order at least two of them.

Is there someone in Hall C that normally handles PCard orders or should we just place the order ourselves using COPS.PHALLC?

Thanks
--
Brian Eng
Detector Support Group
757-269-6018


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