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Subject: Re: OPC UA EPICS device support license
From: Ralph Lange <ralph.lange@gmx.de>
To: EPICS Tech Talk <tech-talk@aps.anl.gov>
Date: Tue, 16 May 2017 14:56:31 +0900
Hi Patrick,

On Sat, May 13, 2017 at 2:40 AM, Thomas, Patrick <pthomas@caltech.edu> wrote:

Am I correct in understanding that the use of the OPC UA EPICS device support available at https://github.com/bkuner/opcUaUnifiedAutomation requires the purchase of a license from Unified Automation?


Well ... depends on your definition of "use".
The client library by Unified Automation is licensed in a way that allows redistribution of applications as binaries (plus shared libraries) royalty-free. However, header files and documentation are explicitly under an NDA.
In other words: using an IOC with that support does not require a purchase, however, creating that IOC does require a license.
If I remember correctly, the upstream author Bernhard Kuner intends to make a statically linked IOC available.

If this is the case, is there OPC UA EPICS device support software available that does not require the purchase of a license?


Have a look at https://github.com/bkuner/freeOpcUaEpicsDevSup, which uses the free OPC UA client library available at https://github.com/FreeOpcUa/freeopcua. However, Bernhard did not find the free client stable and robust enough for production use, and switched to the commercially available client mentioned above.

Again: if someone with a license provides you with a binary, you can use it without restrictions.
Also: Unified Automation charges less than 4000 USD for a source code developer license on the Linux platform, which might be affordable in the end.

Cheers,
~Ralph


Replies:
Re: OPC UA EPICS device support license Jack
References:
OPC UA EPICS device support license Thomas, Patrick

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