Re: [foxboro] Telemetry

We also have a C program that reads floating point values using the "message
pass-thru" functionality of the Integrator.  This doesn't get it into a
C:B.P, but can be quite useful for other purposes and you could then put it
into a shared variable or something if you don't need it too often.  I'm
working on a Perl/TK front end to allow easy occasional examination (and
setting) of any random bits and registers in the PLC without ICC
configuration.

Roger B. Smith
Chief, Process Control Engineering
Waste Water Services
City of Atlanta
404 350-4952

 -----Original Message-----
From:   foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
On Behalf Of Joe Gale (MP)
Sent:   Friday, August 16, 2002 8:05 AM
To:     'foxboro@xxxxxxxxxxxxx'
Subject:        Re: [foxboro] Telemetry


Loyd,

I have a setup using a mcin, calc and ain blocks to get 2 register floating
point on the modbus side into the Foxboro ain block if the floating point is
the only issue limiting the use of the I30B.


Joe Gale
DCS Administrator
Boswell Energy Center
Minnesota Power
1210 NW 3rd Street
Cohasset, MN  55721

218-328-5036 Ext. 4611
email: jgale@xxxxxxxxxxx


-----Original Message-----
From: Loyd Greer [mailto:lgg@xxxxxxx]
Sent: Thursday, August 15, 2002 8:15 PM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] Telemetry



    Thanks Alex,

     I believe what I will need is just a slave. Configuring the controller
and remote terminals is done by another group. I feel just fine letting them
maintain that responsibility. We are reading a PH at the wells and I will
have to find out if that is an integer or floating point.

    Loyd Greer
    Great Lakes Chemical

----- Original Message -----
From: "Johnson, Alex (Foxboro)" <ajohnson@xxxxxxxxxxx>
To: <foxboro@xxxxxxxxxxxxx>
Sent: Thursday, August 15, 2002 3:52 PM
Subject: Re: [foxboro] Telemetry


>
> Number one on the list of things to worry about - The choice of Modbus I/F
> from the I/A Series.
>
>
> There are two for serial links:
>
>
> * The PSS 21H-7G4 B3 <21h7/21h7g4b3.pdf>  Integrator 30, Style B for
> Modbus Devices which speaks pure unadulterated Modbus and
> * The Modbus Device Integrator from Ken Gunston's group which can
> handle almost any Modbus based device.
>
>
> As an example of the differences:
>
>
> * The Integrator 30, Style B for Modbus Devices is a Modbus Master
> only. The MDI can be either Master or Slave.
> * The Integrator 30, Style B for Modbus Devices doesn't handle
> floating point values (only scaled integers (counts) are supported). The
MDI
> can handle 32 bit floating point values.
>
>
> I'll send you a check-off list that I've used before to qualify the choice
> of Modbus interface under separate cover. It is not perfect, but it is
> useful.
>
>
> Regards,
>
> Alex Johnson
> Invensys
> 10707 Haddington
> Houston, TX 77063
> 713.722.2859 (office)
> 713.722.2700 (switchboard)
> 713.932.0222 (fax)
> ajohnson@xxxxxxxxxxx <mailto:ajohnson@xxxxxxxxxxx>
> Shop at the I/A Store and Save on all Invensys Products - www.iastore.com
> <http://www.iastore.com>
> Come to the Invensys Showcase: http://www.invensysshowcase.com/
> <http://www.invensysshowcase.com/>
>
>
> -----Original Message-----
> From: Loyd Greer [SMTP:LGREER@xxxxxxxx]
> Sent: Thursday, August 15, 2002 2:14 PM
> To: foxboro@xxxxxxxxxxxxx
> Subject: [foxboro] Telemetry
>
>
> Hi,
>
>      I am looking at adding 3 Zetron Model 1700 controllers with
> about 120 =
> RTU's to our IA system with a CMP30B interface. I would like to ask
> if =
> anyone has done this with a Zetron controller and if so what
> pitfalls I =
> might look for.=20
>      =20
>      The model 1700 uses modbus RTU protocol. =20
>
>       <<<Loyd Greer>>>
>              Great Lakes Chemical Corp
> =20
>     =20
>
>
>
>
> _______________________________________________________________________
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> Process
> Systems (formerly The Foxboro Company). Use the info you obtain here
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>
>
> _______________________________________________________________________
> This mailing list is neither sponsored nor endorsed by Invensys Process
> Systems (formerly The Foxboro Company). Use the info you obtain here at
> your own risks. Read http://www.thecassandraproject.org/disclaimer.html
>
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_______________________________________________________________________
This mailing list is neither sponsored nor endorsed by Invensys Process
Systems (formerly The Foxboro Company). Use the info you obtain here at
your own risks. Read http://www.thecassandraproject.org/disclaimer.html
 
foxboro mailing list:             http://www.freelists.org/list/foxboro
to subscribe:         mailto:foxboro-request@xxxxxxxxxxxxx?subject=join
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_______________________________________________________________________
This mailing list is neither sponsored nor endorsed by Invensys Process
Systems (formerly The Foxboro Company). Use the info you obtain here at
your own risks. Read http://www.thecassandraproject.org/disclaimer.html
 
foxboro mailing list:             http://www.freelists.org/list/foxboro
to subscribe:         mailto:foxboro-request@xxxxxxxxxxxxx?subject=join
to unsubscribe:      mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave
 
 
 
_______________________________________________________________________
This mailing list is neither sponsored nor endorsed by Invensys Process
Systems (formerly The Foxboro Company). Use the info you obtain here at
your own risks. Read http://www.thecassandraproject.org/disclaimer.html
 
foxboro mailing list:             http://www.freelists.org/list/foxboro
to subscribe:         mailto:foxboro-request@xxxxxxxxxxxxx?subject=join
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