Re: [foxboro] FXBAIS vs PI OPC Interface

Load sharing between PI and AIM*Historian is possible. =


You need to configure AIM*API to share lists with FoxAPI. When this is
done, if the tag is in both AIM*Historian and PI and both packages are
on the same AW, the CP sees a single user.



Regards,
 =

Alex Johnson
Invensys Process Systems
10900 Equity Drive
Houston, TX 77041
713 329 8472 (voice)
713 329 1600 (switchboard)
713 329 1944 (fax)
alex.johnson@xxxxxxxxxxxxxxxx
http://ips.invensys.com =


-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
On Behalf Of Jack.Easley@xxxxxxxxxxxx
Sent: Tuesday, June 24, 2008 2:39 PM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] FXBAIS vs PI OPC Interface

Yes, PI fxbais can be setup to be read-only. Sadly, in our case it is
not. So use of PI read-only from the MESH with a good Firewall is
relatively secure.

However, even if PI access is set up read-only, you should not forget
the matter of additional loading of your control system when PI tags are
added by the PI administrator. We experienced problems with this when at
Version 6.12 NODEBUS with loaded CP30/40s and Integrator 30s.

I don't think AIM is involved with the PI fxbais Interface, only FoxAPI.

Jack Easley

-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
On Behalf Of Johnson, Alex P (IPS)
Sent: Tuesday, June 24, 2008 1:05 PM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] FXBAIS vs PI OPC Interface

Re: Read-only and FoxAPI (and AIM*API for that matter)

It is possible to configure read-only access using FoxAPI. This
configuration is done in the /opt/fox/ais/bin/an_init.tcp file on the
machine running the netFoxAPI Server (an_server).

If this is set, it does not matter what PI is configured to do, the data
will not be written.

For AIM*API, the file is /opt/aim/bin/an_init.tcp.

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