PLCs, PACs

PLCs, PACs February 1, 1998

Rosemount Makes Patent Available to Foundation Fieldbus and HART

It always takes a little self-sacrifice and long-term vision to reach the promised land or invest in a worthwhile future.To help the process industry achieve its long-sought goal of an open, interoperable communication standard, Rosemount Inc. (Eden Prairie, Minn.) announced Jan. 9 that it's making available to FOUNDATION Fieldbus and HART Communication Foundation members a five-year, ro...

By Staff
PLCs, PACs February 1, 1998

Year 2000: No Surprises

Software in your enterprise will start to reach into year 2000 and beyond well before the first day of business in the new millennium—Monday, Jan. 3. People at all levels in your operation are probably already assessing, converting, and testing. Ideally, by the time 2000 rolls around, there won't be any unpleasant surprises, especially on the plant floor.

By Staff
PLCs, PACs February 1, 1998

AC Vector Drives, PLCs Help Roll Out Steel Carpet

If a company plans on churning out 500 feet of cold-rolled steel per minute and add various protective coatings to each mammoth roll, it's going to need a durable and highly accurate automation system.L-S II Electrogalvanizing Company (Columbus, O.), a joint venture of LTV Steel and Sumitomo Metal Industries, faced this dilemma when the company began operations in 1991.

By Staff
PLCs, PACs January 24, 1998

Open, Modular Architecture Controls at GM Powertrain — Non-Technical Issues

Reliability of PC Hardware Integration of open control systems Liability of open control systems Support of open control system implementations Relationship between user and vendor Progression toward OMAC systems Globalization of the OMAC concept The OMAC concept has been presented to many control vendors, equipment builders, and end users, and the OMAC direction is being embraced by many companies. However, during the interactions with many companies about OMAC, many non-technical issues were raised concerning the feasibility of large-scale implementation of OMAC-based systems on the factory floor. Many similar concerns were voiced repeatedly, and perspectives from GM Powertrain are presented in this section to address these issues. Reliability of PC Hardware The GM Powertrain Windsor and Romulus plants have installed and are in the process of installing more than 500 PC based controllers.

By C. Michael Taylor, et al.
PLCs, PACs January 1, 1998

Fisher-Rosemount, Avenor Unveil Foundation Fieldbus Installation

Fisher-Rosemount recently contracted with Avenor Inc. (Montreal, Quebec, Canada), an international pulp and paper company, to install a Fieldbus Starter Kit in the kraft paper area at Avenor's 1,200 tpd mill in Gatineau, Quebec. The facility uses kraft pulp in newsprint production to achieve specific quality characteristics.

By Staff
PLCs, PACs October 9, 1997

ISA TECH/97 Highlights From Anaheim, Calif., Day Three

OPC on the ISA TECH/97 Floor OLE for Process Control (OPC) was demonstrated on the floor at ISA TECH/97. Based on Microsoft's component object model technology, OPC allows components in a networked system to share process data. The Microsoft and OPC booths demonstrated the interoperability of products from 16 foundation members. The booth demonstrations show real-time data flowing between hardware such as programmable logic controllers and distributed I/O from various manufacturers to human-machine interface and supervisory control and data acquisition software systems over Ethernet using TCP/IP.

By Control Engineering Staff
PLCs, PACs May 1, 1997

Bode plots solve frequency domain problems

Every child who has ever held a spring upright knows that tugging on the top end causes the bottom end to start bouncing and that repeated tugging keeps those oscillations going. Some may notice that even though both ends always oscillate at the same frequency, the bottom end bounces higher at some frequencies than at others. Truly gifted children might even notice that the bottom end oscillates out of sync with the top end and lagsfurther and further behind as the frequency increases. Engineers know that many mechanical, electrical, and chemical processes with energy-storing components behave the same way.

By Vance J. VanDoren, consulting editor
PLCs, PACs February 1, 1997

PCs, Flowcharts, and SDS Speed Production at Silicon Graphics

Smart Distributed System

By Control Engineering Staff