Marty,
There is already one implementation of OPC server that communicates with QNX
box, and that is Virgo 2000 from AlterSys (see http://www.altersys.com),
which implements an OPC server for their QNX controller (pretty much the
same stuff you would like to do).
If you want to see the OPC server specifications, then follow
http://www.opcfoundation.org. Some companies will sell you tools to write
OPC servers (http://www.iconics.com).
See also http://dspace.dial.pipex.com/opc/.
Regards,
Zeljko
----- Original Message -----
From: “Marty Doane” <doanemr@rapistan.com>
Newsgroups: comp.os.qnx
Sent: Tuesday, August 08, 2000 10:06
Subject: Any OPC Wisdom Here?
I’ve recently been asked to look into adding an OPC server to a QNX design
we’re in the midst of. OPC is “OLE for Process Control”, and “provides a
mechanism to provide data from a data source and communicate the data to
any
client application in a standard way.” They tell me that most of the
popular
HMI packages support OPC, so if a controller includes an OPC server, it is
compatible with all these packages.
OPC looks pretty cool to me. Lots of flexibility and power. I can see lots
of ways it could make things easier for us. The bad part is that it’s
built
on DCOM (shudder), which, if I understand it correctly, is rarely used
outside of a Microsoft environment.
So on to the questions:
Anyone familiar with OPC? What do you think of it?
Do you know of an OPC server port to QNX 4.25? Neutrino?
Do you know of DCOM availability for QNX 4.25? Neutrino? Is it feasible?
Thanks,
Marty Doane
Rapistan Systems
Armin, I’m guessing this might be right up your alley.
\
“Marty Doane” <doanemr@rapistan.com> wrote in message
news:8mp43v$gfb$1@inn.qnx.com…
I’ve recently been asked to look into adding an OPC server to a QNX design
we’re in the midst of. OPC is “OLE for Process Control”, and “provides a
mechanism to provide data from a data source and communicate the data to
any
client application in a standard way.” They tell me that most of the
popular
HMI packages support OPC, so if a controller includes an OPC server, it is
compatible with all these packages.
OPC looks pretty cool to me. Lots of flexibility and power. I can see lots
of ways it could make things easier for us. The bad part is that it’s
built
on DCOM (shudder), which, if I understand it correctly, is rarely used
outside of a Microsoft environment.
So on to the questions:
Anyone familiar with OPC? What do you think of it?
Do you know of an OPC server port to QNX 4.25? Neutrino?
Do you know of DCOM availability for QNX 4.25? Neutrino? Is it feasible?
Thanks,
Marty Doane
Rapistan Systems
Armin, I’m guessing this might be right up your alley.