Abstract

This article focuses on field bus technology, a digital two-way conul1unications protocol. It is designed to take advantage of intelligent instrumentation equipped with microprocessors to communicate between the field and the control room. Because it can communicate large quantities of data from the field devices, industrial networks tying together field bus instruments open the way for complex control and automation tasks. As field bus evolves, some think that computer networking will play an increasingly important role and improve the performance in the plant. Both Profibus and Fieldbus Foundation provide for Ethernet capability. Wireless communication is also likely to play a potential role in field bus systems. There is a potential for wireless in data acquisition. Issues still needed to be worked out: electrical storms can interfere with communications and wires must be strung to power the devices.

Highlights

  • One example of what it provides is improved diagno - the field and the control room

  • One advantage of Foundation Fieldbus is its function blo ck capabilities embedded in the devices that allow control at the device level in the fi eld, said

  • "They have within them a schedule of w h at is suppo sed to h app en w ith th e bu s and th e fun ctionality to p e rfo rm pro cess control in the field ."

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Summary

PlantWeb m arketing m anager of Emerson

Pro cess M anage m ent in Ed en Prairi e, Minn. , with Foundation Fieldbus, there is a lot more intelligen ce in th e devi ce itself. "They have within them a schedule of w h at is suppo sed to h app en w ith th e bu s and th e fun ctionality to p e rfo rm pro cess control in the field .". Foundation Fi eldbu s uses a proto c ol called publish /s ubsc rib e, which w ill publish information-for example, a temp erature reading that has four sub sc ribers-so. Other attractive benefits of field bus devices amount of bandwidth that is used to do the job," Wallace include mu ch lower wiring, engineering, and assembly said. What's more, with them selves, even if the host goes dow n , the bus can keep all that information, it's easier to keep tabs on systems in op erating, and safe and effective pro cess control can b e hazardous conditions

Two FLAVORS
MIXING AND MATCHING
SERVING Two MARKETS
Both Foundation Fieldbus and Profibus
Fieldbus devices operate on its D elta
Going Digital
THE NEXT STEPS
Findings
BIG GROWTH PREDICTED
Full Text
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