Re: [foxboro] ABSCAN Detail Display information
- From: "Wilson, Brad" <brad.wilson@xxxxxxxxxxxxxxxx>
- To: <foxboro@xxxxxxxxxxxxx>
- Date: Thu, 11 Jun 2009 09:30:50 -0400
You undoubtedly saw that the visible of the UPDATE button is connected
to SCNTYP. When ABSCAN is in event-driven mode (SCNTYP=1) the UPDATE
button is visible and selecting it sets UPDATE to 1, thereby forcing an
ABSCAN update as if an event had triggered it. UPDATE should then reset
back to 0 to await the next trigger, either by an event or by the UPDATE
button. Normally the A-B controller monitors its data table and sends a
trigger if it sees any change. Although I haven't tried it, you should
be able to set UPDATE from any script and accomplish the same result.
When SCNTYP=0, the ABSCAN is in polled mode and doesn't wait for a
trigger from the controller, but rather sends read messages on a regular
basis. The UPDATE button is invisible.
You're correct that the UPDATE button is not documented well (at all) in
B0193RG, which is very detailed in describing the SCNTYP variations, and
the operation of UPDATE should derive naturally from that.
Brad Wilson
brad.wilson@xxxxxxxxxxxxxxxx
Invensys Process Systems, Inc
1090 King Georges Post Rd, Suite 204
Edison, NJ 08837
732-661-4012 o
732-874-0087 c
-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
On Behalf Of Tim Ruhland
Sent: Wednesday, June 10, 2009 6:43 PM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] ABSCAN Detail Display information
a clarification:
There is a button on the Detailed Display for the ABSCAN block labelled
UPDATE. This sets the UPDATE parameter on the block to a 1.
What does this UPDATE parameter do? Is there any documentation available
for
this?
On Wed, Jun 10, 2009 at 3:24 PM, Tim Ruhland <truhland@xxxxxxxxx> wrote:
> Hi all,
>
> Simple question, but one that has me stumped:
> On the Detail Display for an Integrator 30 ABSCAN block, what does the
> UPDATE parameter do?
>
> Special Guru Bonus Attibution available if you can reference any
Foxboro
> documentation which explains this.
>
> Regards,
> Tim Ruhland
> Automation Engineer
> Eichleay Engineers of California
> Concord, CA 94520
> (925)-363-3187
>
>
>
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