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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