Re: [foxboro] Telemetry

Thanks to all who replied,

       What we need is a Master only, so it looks like the CMP30B will do =
what we need.
=20
        It looks like we can get floating point with one of the other =
methods mentioned, if we need that later on.

       Thanks again,
<<<Loyd Greer>>>
       Great Lakes Chemical   =20

>>> RSmith@xxxxxxxxxxxxxxxx 08/16/02 09:15AM >>>

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]=
=20
On Behalf Of Joe Gale (MP)
Sent:   Friday, August 16, 2002 8:05 AM
To:     'foxboro@xxxxxxxxxxxxx'=20
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=20


-----Original Message-----
From: Loyd Greer [mailto:lgg@xxxxxxx]=20
Sent: Thursday, August 15, 2002 8:15 PM
To: foxboro@xxxxxxxxxxxxx=20
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=
=20
> <http://www.iastore.com>
> Come to the Invensys Showcase: http://www.invensysshowcase.com/=20
> <http://www.invensysshowcase.com/>
>
>
> -----Original Message-----
> From: Loyd Greer [SMTP:LGREER@xxxxxxxx]=20
> Sent: Thursday, August 15, 2002 2:14 PM
> To: foxboro@xxxxxxxxxxxxx=20
> Subject: [foxboro] Telemetry
>
>
> Hi,
>
>      I am looking at adding 3 Zetron Model 1700 controllers with
> about 120 =3D
> RTU's to our IA system with a CMP30B interface. I would like to ask
> if =3D
> anyone has done this with a Zetron controller and if so what
> pitfalls I =3D
> might look for.=3D20
>      =3D20
>      The model 1700 uses modbus RTU protocol. =3D20
>
>       <<<Loyd Greer>>>
>              Great Lakes Chemical Corp
> =3D20
>     =3D20
>
>
>
>
> _______________________________________________________________________
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> Process
> Systems (formerly The Foxboro Company). Use the info you obtain here
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=20
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