The electronics and computer engineering programs at the University of Southem Mississippi ofler two process control courses. One is based on classical continuous domain techniques while the other utilizes the discrete domain. Historically, Distributed Process Control {DPC) tasks have required main-frame or high-end mini-computers, usually with proprietary sofhuare. Our experience with an LC-4 Controller {micro-computer) which has been eflectively utilized in the discrete control course for DPC is described. Other than the host personal computer {PC), the system comprises OPTO 22 distributed controllers connected by an Optomux network. The system's extended features have a modest cost {$8000.00 for a limited number of controllers) making it attractive for instructional use. The system implemented, consisted of a PC host and three distributed LC4 controllers for a total of 144 digitallanalog extemal data connections. We found the system capable of real time distributed process monitoring and control with many of the accustomed main-frame features. The control strategy for a system having a maximum of 256 controllers and 4096 total U0points could in principle be implemented with this system. Because of student time constraints, student projects are obviously less complex than that; however, the DPC concepts are easily grasped since the students quickly realize that the only real difference between the experiments and complex tasks is the number of 1/0 points actually connected.During the course, conventional simple applications, such as a 3-mode controller, can be individually implemented on the same system. This helps to build the necessary skills to complete the more complex tasks of DPC as the course progresses. This system truly allows the host computer to distribute control tasks to subordinate computers in the control hierarchy. We have used this system extensively in the Computer Engineering Technology Digital Control Systems Laboratory. 0-7803-3348-9 0 EEE 1513
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