Re: [foxboro] 100ms data recording

The OM supports 100ms updates if and only if:

1) The CP is configured with a 100ms BPC
2) The client application asks for 100ms updates.

The first requirement can have loading impact as the CP will now
spend more time doing overhead work (switching tasks for example).
To avoid spiky operation, you need to be sure to phase your control
loops over the 100ms BPC. This is very important and could require
significant effort.

With regard to the second requirement, the only standard application
that supports 100ms OM updates are:

1) FoxView and
2) I/A Series DAServer that comes with InFusion View workstations and
   the InFusion Application Environment. These stations may be added to
a
   V8.3 system without issue.

A few notes on the topic:
1) AIM*API does not support 100ms updates and for that reason
AIM*Historian
   cannot receive them.
2) The I/A Series DAServer does support OPC DA so it should be able to
   source data to OPC DA Clients at 100ms. InFusion Historian can be
   used to record these updates as well.
3) You could write your own application, but at this time IPS does not
   Provide an SDK for development using the deprecated APIs, e.g., the
   OM API. The preferred application development API is FoxAPI which
   Like AIM*API does not support 100ms data feeds. I'm working to
correct
   that, but I don't have it ready yet.


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 Entoro Wijaya
Sent: Monday, August 11, 2008 8:30 AM
To: foxboro@xxxxxxxxxxxxx
Subject: [foxboro] 100ms data recording

Hi All,
Anyone ever try to do 100ms data recording sampling? I have end user
that
want to have data recording
for 100ms for at least 7 consecutive days.

I'm using IA series Ver. 8.3 XP, FCP270 and AIM* 3.3

Regards,
Entoro




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Systems (formerly The Foxboro Company). Use the info you obtain here at
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