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Date: Thu, 14 Apr 2016 14:30:54 -0700 (PDT)
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Subject: Re: Simple Components 4.12 with MQTT implementation released
From: slos <new.stephane.los@gmail.com>
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Xref: news.eternal-september.org comp.lang.ada:30114
Date: 2016-04-14T14:30:54-07:00
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Le jeudi 14 avril 2016 23:03:47 UTC+2, bj=F6rn lundin a =E9crit=A0:
> On 2016-04-14 18:47, Dmitry A. Kazakov wrote:
> > On 2016-04-14 15:01, slos wrote:
> >=20
> >> Anyone for OPC ? ;-)
> >=20
> > Well, which of?
> >=20
> > OPC DA is, truth to tell, garbage.
>=20
> Yes.
>=20
>=20
> > OPC UA is under permanent development. It is impossible to say when it
> > will reach even a semi-standard stage.
>=20
> Iteresting. Never heard of it.
> But we left the OPC-world 10 years ago,
> when we realized it is much better with direct socket
> with some protocol we PLC-guys and we could agree upon.
>=20
> >=20
> > Regarding architecture, OPC is barely usable in automation because of
> > its heavy client/server architecture. Part of our business is to replac=
e
> > OPC with better middleware architectures. Replacement works smoothly
> > because in most cases you can throw out the OPC server and communicate
> > with the hardware directly. E.g. most SPS' support either ITOT or
> > ModBus, each far superior to OPC.
> >=20
>=20
> The only real advantage I can see is the OPC-scout - a way of
> browsing raw data in the plc.
> But that is for manual use, and troubleshooting,
> so for 'office' use I can see OPC as something not too bad -
> hence why I wrote down the opcda code in another answer.
> For automation - other protocols are better
>=20
>=20
> --=20
> --
> Bj=F6rn

Be prepared to ear about it soon.
Just google for "industry 4.0 opc ua"