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Session 3432

System Approach for Design and Construction of PLC Training Laboratory

Daniel Wong, Harold Peddle College of the North Atlantic

Abstract

Programmable Logic Controller (PLC) technology is undergoing rapid technological changes as a result of the advances in control and instrumentation technology, and the associated fields of computing and communications. This paper describes the approach used for planning, design and construction of a PLC training laboratory by College of the North Atlantic. This paper highlights the importance of adaptability, safety, reliability and maintainability of the system. It also discusses the capability of the lab to be accessed from remote sites through wide area networks (WANs) connections on an open architecture non-proprietary system.

I. Introduction

The new PLC training laboratory consists of PLCs, PC computers, Human Machine Interface (HMI), variable speed drives, local panels, actuator/sensor modules and distinct, yet interconnected networking capability. In today’s environment, it is important to have remote access ability through Ethernet/Internet in order to provide training at remote areas. This capability will also allow users access to the laboratory from remote training sites. Further, the installed system must be flexible to facilitate additions and modifications in the system.

II. Discussion

This paper discusses how these issues have been addressed efficiently in a laboratory at College of the North Atlantic. In order to address the networking capability among remote PCs, local PCs, and local PLCs, the HMI and field devices, the networking can be classified at three levels. See figure 1.

The first level is the Ethernet (LAN and WAN) which enables communication between PC and PLCs. This Ethernet system must meet a common standard which in this application is IEEE 802.3. This allows many multiple manufacturers of Ethernet compatible devices to access the network at any given time.

The second level is the Fieldbus system which enables communication between the PCs, PLCs HMI and the drives. It is a multi point interfacing system which enables communication between PLCs and field devices. Multiple masters and slaves can co-exist on the same network.

Proceedings of the 2001 American Society for Engineering Education Annual Conference & Exposition Copyright © 2001, American Society for Engineering Education

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Peddle, H., & Wong, D. (2001, June), System Approach For Design And Construction Of Plc Training Laboratory Paper presented at 2001 Annual Conference, Albuquerque, New Mexico. 10.18260/1-2--9837