Re: Support for Edwards nXDS 10i

[Heinz Junkes via Tech-talk <tech-talk@aps.anl.gov>]

Thank you Mark for the response.

I know your Modbus driver very well and use it in many places.
The problem with the nXDS is that I have no documentation for Modbus.
So no register description etc..
I only have documentation on the ASCII commands, but this is probably ignored by the device.
Danke Heinz


> On 16. Jul 2025, at 18:16, Mark Rivers <rivers@cars.uchicago.edu> wrote:
>
> Hi Heinz,
>
> If a device speaks both Modbus and ASCII then often there is something you need to do to tell it which protocol to use.  It probably does not "autosense" from the data you send it.
>
> Modbus is a popular protocol, and is quite easy to use with EPICS.  I have written a driver for it here:
> https://github.com/epics-modules/modbus
> https://epics-modules.github.io/modbus/
>
> Mark
>
>
>
> -----Original Message-----
> From: Tech-talk <tech-talk-bounces@aps.anl.gov> On Behalf Of Heinz Junkes via Tech-talk
> Sent: Wednesday, July 16, 2025 5:41 AM
> To: tech-talk@aps.anl.gov
> Subject: Support for Edwards nXDS 10i
>
> Hi Techies,
>
> We are trying to commission an Edwards scroll pump nXDS 10i with streamdevice via serial communication and streamdevice.
> We have a protocol description with serial 9600 baud and Ascii communication like "?V808\cr”
>
> But unfortunately with these settings nothing happens on the link.
>
> There is a Windows-Programm whitch runs with 38400 baud and binary communication protocol ( named Modbus?).
> This works.
>
> Does anyone have such a pump in operation?
> Are there different protocol variants?
> Do we have the wrong documentation?
>
> Danke Heinz
>

Attachment: smime.p7s
Description: S/MIME cryptographic signature