The design for a digital communications link for AC adjustable frequency drive controllers

Author

Innes, Mark E. ; Liptak, J. Michael

Author_Institution

Square D Co., Columbia, SC, USA

fYear

1989

fDate

9-12 Apr 1989

Firstpage

449

Abstract

The design of a simple, rugged digital communication system for AC adjustable-frequency drives is presented. The system is composed of a microprocessor-based local controller circuit located at the drive controller proper and an RS-422 connection to a programmable logic controller. The microprocessor-based system features remote control, status monitoring, and network capability. A natural outgrowth of the microprocessor implementation is the ability to perform distributed closed-loop control functions at the drive controller. This ability allows the use of high-level commands, which reduces the work load of the programmable logic controller

Keywords

AC motors; closed loop systems; computerised control; digital communication systems; machine control; microcomputer applications; programmable controllers; telecommunication links; telecontrol; variable speed drives; velocity control; AC adjustable-frequency drives; closed-loop control; digital communications link; high-level commands; machine control; programmable logic controller; remote control; variable speed drives; Cable shielding; Communication system control; Control systems; Costs; Data communication; Digital communication; Drives; Frequency; Microprocessors; Programmable control;

fLanguage

English

Publisher

ieee

Conference_Titel

Southeastcon '89. Proceedings. Energy and Information Technologies in the Southeast., IEEE

Conference_Location

Columbia, SC

Type

conf

DOI

10.1109/SECON.1989.132418

Filename

132418