Re: [foxboro] FBM224 and ProSoft modules

The FBM224 is a Modbus RTU Master.

Throughput varies with baud rate and turn around time in the PLC. Generally,
that's where we see the performance hit. Seems most PLCs think they have
more important things to do than respond to our requests.



Regards,
 
Alex Johnson
Invensys Process Systems
Invensys Systems, Inc.
10707 Haddington
Houston, TX 77043
713.722.2859 (voice)
713.722.2700 (switchboard)
713.932.0222 (fax)
ajohnson@xxxxxxxxxxx

-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On
Behalf Of stan
Sent: Thursday, January 20, 2005 9:37 AM
To: Foxboro List
Subject: [foxboro] FBM224 and ProSoft modules

We are embarking on a project that will use an FBM224 talking to a ProSoft
ModBus Protocol module in a PLC5.

I was wondering if anyone on the list had attempted this yet? If so, I would
like to hear what level of performance was achieved. The FBM224 is a ModBus
master, right? So I need a ProSoft ModBus slave then? We plan on moving a
moderately large amount of data this way, and I envision that I will need
more than one set of block transfers in the PLC to accomplish this. Given
this, i am interested in what I can expect for throughput.

TIA.

-- 
"They that would give up essential liberty for temporary safety deserve
neither liberty nor safety."
                                                -- Benjamin Franklin
 
 
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