HMI, OI March 1, 1998

Active-X/DCOM funtionality

Moraga, Calif. —New enhancements including Microsoft's DCOM (Distributed Component Object Model) and Active-X; Structured Query Language database support, and the latest Transmission Control Protocol/Internet Protocol networking functions of Windows Sockets 2.0 specifications have been added to AIMAX for Enterprise software.

By Staff
HMI, OI March 1, 1998

Live Data to Virtual Library

Willoughby Hills, O. —Paragon ShopDoctor Virtual Library can now bring live data to its plant-wide network that includes more than 150 types of document formats. Live data can come from any DDE server application such as RSLinx or Excel. It can also link real-time PLC data and HMI tags to MS Word documents, spreadsheets, flowcharts, drawings, and pictures.

By Staff
HMI, OI March 1, 1998

TA Engineering to Unveil AIMAX for Enterprise Enhancements

A new web server, data-logger historian, "alias" database for long tag name support, expanded soft-logic support, and a "keyless" software protection system are among enhancements that TA Engineering Co. recently added to its AIMAX for Enterprise software. These improvements use Microsoft's DCOM (distributed component object model) and ActiveX; SQL (structured query l...

By Staff
HMI, OI October 8, 1997

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

Boeing Explores Development of 'Smart' Transducer Bus Lee Eccles of Boeing Commercial Airplane Co. began his presentation in the 'Use of Automation to Enhance Productivity in the Aerospace Industry' by asking the question 'why bother?' In structural sensing and testing of airplane wings and fuselages at Boeing, a lot of effort goes into simply setting up the test. Structures for destructive testing of a wing or testing flight-control actuators require huge setup times.

By Control Engineering Staff
HMI, OI August 1, 1997

Ground Loops and Their Cures

The National Electrical Code (NEC) defines a ground as 'a conducting connection, whether intentional or accidental, between an electrical circuit or equipment and the earth, or to some conducting body that serves in place of the earth.' A ground loop can be defined as any objectionable current flowing in a circuit's ground or return path. Here is a short guide that will help identify possible sources of ground loops in your electrical systems and how to solve them. The simplest ground loop involves connection between two different earth grounds as shown in the top figure. With earth ground #1 at one potential, and earth ground #2 at a different potential, a ground loop current will flow in the loop as indicated.

By William L. Mostia, Jr. PE, Amoco Chemicals
HMI, OI January 1, 1990

Buyer’s Guide Information

Control Engineering Buyer's Guide 2000-01FREQUENTLY ASKED QUESTIONS... Q. How do I update my free listings?A.

By Control Engineering Staff
HMI, OI January 1, 1970

Ruggedized computer controls mining equipment

Equipment used in open pit mining travels over some of the worst terrain in the world—in hostile environments that include temperature extremes and lots of dust and dirt. Aquila Mining Systems (Montreal, Quebec, Canada) provides computer-based monitoring, control and guidance systems for large blasthole drills.

By Gary A. Mintchell, Senior Editor,