Re: [foxboro] Siemens S7 connected with I/A

I would prefer to use Modbus, because modbus is easier for ME to fault
find.  You can plug in a laptop and listen to the transactions flying
past. The transactions are simple to diagnose.  Even ethereal can decode
them if you use Modbus TCP/IP.  I have not been able to do this with
Profi.  That is my opinion anyway.  Profi has its good points too, but I
don't know what's going on inside.  Although when I just spelled check
my email modbus came back as mudbugs and profi as profit. Hmmmm

Regards
Sean

-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
On Behalf Of Weiss, Andreas
Sent: Wednesday, 23 May 2007 7:52 PM
To: foxboro@xxxxxxxxxxxxx
Subject: [foxboro] Siemens S7 connected with I/A

Hi,

which protocol would you prefer if you had to connect a Siemens S7 PLC
with an I/A DCS? Profibus or Modbus?
We use both at this time and it isn't a engineering problem. It's more
that the S7 is new for us and we have the choice.

Regards,
Andreas


Ineos Cologne



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