I wanted to bring visibility to several recent comments from an earlier post, Major Difference between Foundation Fieldbus and HART Protocols. Here's the summation thought from the first comment: …With one software package, and as put above with HART pass-through, you...
Dan Daugherty
Considerations in Foundation Fieldbus Cable Design
The Fieldbus Foundation has an active LinkedIn group where users of this digital bus communications technology share expertise. I saw a recent question [hyperlink added]: i came across a document which mentioned that in reality IEC 61158 specified cable is actually...
Guidelines for Engineering Wireless Instrumentation
I caught up with Emerson's Dan Daugherty, whom you may recall from earlier digital bus and wireless-related posts. Dan has been focusing his efforts on WirelessHART project implementation practices over the past year. Much like the introduction of various fieldbuses...
The Case for Control in the Field-based Control
John Rezabek closes his ControlGlobal.com Surprise! Field-Based Control Beats DCS article with the thought: The SP50 committee set out years ago to define and specify a robust, vendor-independent controls suite exploiting the intelligence of microprocessor-based field...
Dispelling a Rules of Thumb in Foundation Fieldbus Segment Sampling Rate
On the Fieldbus Foundation Forums is a recent post, Macrocycle for control in the controller. The post begins: I have seen many posts about scheduling and macrocycle calculation for control-in-the-field (CIF). I have some doubts about control-in-the-controller (CIC)...
Control Response Period for Foundation Fieldbus Control-in-the-Field Loops
A great question came in the Process Automation Usability Project forum asking why there is not more control in the field being done. If you're unfamiliar with the term, it's where a Foundation fieldbus (FF) transmitter, digital valve controller, or other instrument...
Response to Foundation Fieldbus and Profibus PA Cost Comparison Whitepaper
Update: This post is from originally from 2008. It recently came up in an "archived tweet" message. The "fieldbus wars" have cooled considerably in the time between the original post and now... thanks for stopping by! ORIGINAL POST: In the early days of Foundation...
Calculating Foundation Fieldbus Segment Loading
When engineering a project with Foundation fieldbus, one element to consider is the electrical loading on each segment. I received an email the other day asking:...to find required formulas to calculate FOUNDATION FIELD BUS loading... I am using [brand X] product and...
Diagnostics in Device Busses Improve Operations
I caught up the other day with Emerson's Dan Daugherty, whom you may recall from an earlier post on Foundation fieldbus operational benefits. Dan is a fieldbus consultant and has a lot of experience working with process manufacturers on their digital bus...
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