PLCs, PACs

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
PLCs, PACs January 1, 1970

Components provide network, Internet capabilities

Alpharetta, Ga. —Simatic Net series of control hardware, firmware, and cabling options complements this line of high-speed switches that integrate production floor and critical IT data at 100 Mbps. These industrial Ethernet components allow users to build a high-bandwidth network with Internet management capabilities and are optimized for connectivity with a native-socket, TCP/IP firmwa...

By Staff
PLCs, PACs January 1, 1970

Three web server architectures aid plant-floor, enterprise integration

Driven by manufacturing's desire to connect the factory floor with the rest of the enterprise, web-enabled PLCs and Ethernet are giving users new ways to view and control factory data using embedded web servers. When selecting a web-enabled automation device, users can choose from three distinct system architectures.

By Richard Baker
PLCs, PACs January 1, 1970

Schneider sues Opto 22

Chicago, Ill.—Wherever two or more gathered during National Manufacturing Week 2001, March 5-8, their discussion involved patents. As reported in Control Engineering, Feb. '01, p. 32, Schneider Electric Automation (North Andover, Mass.) followed news about its minority investment in Entivity by announcing an open auction on the web for its patent, "Device for Communicating Real-time Dat...

By Gary Mintchell, senior editor, gmintchell@cahners.com