Re: [foxboro] One Mesh vs Multimesh
- From: "Johnson, Alex P (IOM)" <Alex.Johnson@xxxxxxxxxxxx>
- To: "foxboro@xxxxxxxxxxxxx" <foxboro@xxxxxxxxxxxxx>
- Date: Tue, 9 Nov 2010 11:21:47 -0600
Separate control networks are somewhat easier to administer and upgrade.
Separate control networks are harder to link to exchange data among units.
Typically, Steam Header pressure and temperature is needed in every unit and if
the systems are separate that is harder to supply.
Options to link separate systems if you go that route include:
1) FDSI to FDSI links (Modbus typically)
2) INI70
3) OPC DA - (AW70 running OPC DA Server to FDSI running OPC DA Client)
Each approach has its strengths and weaknesses.
My experience is that the right solution depends on the amount of
interdependency among the units being linked.
Regards,
Alex Johnson
Invensys Operations Management
10900 Equity Drive
Houston, TX 77041
+1 713 329 8472 (desk)
+1 713 329 1600 (operator)
+1 713 329 1944 (SSC Fax)
+1 713 329 1700 (Central Fax)
alex.johnson@xxxxxxxxxxxx (current)
alex.johnson@xxxxxxxxxxxxxxxx (good until September 2010)
-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On
Behalf Of Olsson, Scott
Sent: Tuesday, November 09, 2010 11:14 AM
To: foxboro@xxxxxxxxxxxxx
Subject: [foxboro] One Mesh vs Multimesh
What are the Advantages and Disadvantages of 1 Mesh for the entire Plant vs a
Mesh for each Unit
Scott Olsson
PNM Resources
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