| Summary: | 碩士 === 中華大學 === 科技管理研究所 === 94 === In recent years, with the development of more precise and complicated control units in the production manufacturing systems, the traditional process control designs via Ladder Logic Diagrams become more difficult and inflexible, and the variances of process are also far harder to deal with. The advanced functions of control programming design and system troubleshooting diagnosis would be expected to develop for effectively reducing the process time and increasing the efficiency of machines. This research proposes Timed Petri-Net to build the Modulus Production System (MPS) real-time dynamic control and a remote monitoring model which can be fell into the following stages: using Visual Basic Programming language to create the real-time dynamic model and developing the remote control system through process control. Furthermore, an ActiveX-based monitoring webpage would be dedicated to data transition and communication.
This study employs the MPS testing device to establish the relevant software and hardware interface and construct a real-time Timed Petri-net model in the Automation and Logistics laboratory of Chung-Hua university. Comparing with the previous remote monitoring system, the presented network expresses the responses of movements or the state through timeliness delay in the Timed Petri-net model in order to prevent MPS from taking place and deadlock. The experimental procedures are as follows: first analyzing the MPS operation process, and then developing the various Petri-net diagrams in terms of MPS machines. Additionally, a real-time dynamic Timed Petri-net model can be generated, in accordance with different machine functions, to adapt the control interfaces and the off-line testing and verifying ways of machines. If the real-time dynamic Timed Petri-net model is proved successful to meet MPS operational process, then exploiting the webpage to build remote monitoring system for implementing the real-time troubleshooting diagnosis.
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