Last week I highlighted an updated tool for designing Foundation fieldbus segments. Emerson’s Jonas Berge left a great comment with links for additional resources to which I wanted to bring visibility in this post. I’ve also inserted some hyperlinks where you can find additional information.
In my personal opinion this software is a great design tool but should be used correctly because the usability of fieldbus has improved also with respect to easier design. Fieldbus has become more powerful and therefore more flexible than it was years ago. Some history: in the early days of fieldbus, the fieldbus power supplies (“conditioners”) had a low output voltage (less than 24 V) and, in particular, intrinsic safety barriers used the ‘entity’ concept which severely limited voltage (11 V) and current (60 mA). Back then fieldbus segments had to be designed one by one, each bus segment calculated to cram in as many devices as the low voltage would permit based on the exact cable length and current draw of each device. Due to the limitations, that design principle was required. Since a large plant has many bus segments, the tool came in very handy to make all these calculations. Because fieldbus power supplies and safety barriers have evolved, that same design principle need not be applied. It is now much simpler. Continue Reading ▶
Author: Douglas Morris
Germany has established itself as a leader in developing renewable power and has accelerated its efforts since the Fukushima nuclear accident in 2011.
To date, the share of renewable generation in Germany exceeds 25 percent.
To spur development, the country has in place a tariff system that provides incentive to build solar and wind. This system did just that, but it also raised the prices of German electricity to some of the highest in the world. Not only is the cost high, but the renewable surcharge per kilowatt hour grew considerably. Continue Reading ▶
Author: Jonathan Lustri
The process control domain continues to get more and more sophisticated as Emerson’s customers use process models and increasingly sophisticated calculations to optimize process control. Once case in point is an example I saw at last year’s Emerson Exchange conference where one of Emerson’s customers presented how they using advanced mathematics to detect the peak UV absorbance during chromatography elution. While this seems like a simple enough, this required solving partial differential equations, Linear algebra, and vector based mathematics.
Solving Partial Differential Equations
The mathematical function used to represent the chromatography peak was the Extreme Value Function which was referenced for this purpose by the Journal of Chromatography. This function is easy to solve using applications such as Matlab. But very difficult to solve using DeltaV controller modules and Calc Blocks! Continue Reading ▶
If you use Foundation fieldbus
technology with your smart instrumentation in your plant or perhaps may in the future, I want to share that an updated Segment Design Tool
is now available for you to download.
This tool is specifically designed to verify physical and electrical parameters of a Foundation™ fieldbus (FF) segment, operating under Emerson Process Management host system interfaces, such as DeltaV distributed control systems, AMS Device Manager software, and Ovation expert control systems.
This release has added support for the Windows 7 operating system, improved FF devices library management and support for both Simplex and Redundant H1 cards of DeltaV S series with Integrated Power Supply, and numerous field devices from a variety of manufacturers listed on Device Install kit of website of Emerson. The Segment Design Tool is compatible with the Windows XP / Windows 7 operating systems.
Once you download and install the tool, you’ll want to register it to get full access to all the embedded features within the tool. Also, here is an email link to the support team should you experience any issues.
To connect and interact with other Foundation fieldbus host system users, join the DeltaV, Ovation and/or Asset Optimization, Maintenance & Reliability tracks of the Emerson Exchange 365 community.
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You may have seen the news of the 2013 HART Plant of the Year noting:
HART technology has helped reduce production downtime related to control valve failures… We use the HART signal to monitor real time valve conditions which has helped with identifying problems before they could cause unplanned events. This reliability effort combined with several improvement initiatives has yielded significant financial savings including millions of dollars in EBIT [earnings before interest and taxes].
I turned to Jeff Wilson
with Emerson local business partner Puffer-Sweiven
for more on how these savings were achieved.
The story began more than a decade ago when Fisher FIELDVUE digital valve controllers (DVCs) were installed with AMS Device Manager with ValveLink software to calibrate the DVCs with the control valve and actuator assembly. The software was also used to identify which valves needed to be pulled and serviced during plant turnarounds. While this method of use created savings, it was primarily a reactive mode of operation.
As additional trains were instrumented with FIELDVUE DVCs, Jeff worked with the plant staff to incorporate the use of AMS Device Manager in a more proactive, condition-based manner. The DVCs included Performance Diagnostics (PD) that help identify friction, deadband, air leaks, drifting and other issues impacting the performance of the control valves. These diagnostics run while the valve operates. The HART digital communications protocol is the standard by which the data is communicated between the digital valve controllers & other HART-based devices and the AMS software & other HART-based applications such as handheld devices and control systems. Continue Reading ▶