| 基于VB6．0的S7-200PLC与计算机的通讯设计 |
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| 引用本文： | 李伟,赵经,杨承,李明. 基于VB6．0的S7-200PLC与计算机的通讯设计[J]. 可编程控制器与工厂自动化(PLC FA), 2008, 0(6): 59-62 |
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| 作者姓名： | 李伟 赵经 杨承 李明 |
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| 作者单位： | 西南林学院交通机械与土木工程学院 |
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| 摘 要： | PLC与计算机通讯的专业软件虽然功能强大，但在许多简单应用场合性价比不高。为此，本项目利用S7-200PLC的自由口通讯协议，基于VB6．0开发了一种简单实用的监控界面，其中计算机作为上位机，通过MSComm控件建立与下位机PLC的通讯，可以实现数字量和模拟量读写、存储及模拟量趋势曲线绘制。
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| 关 键 词： | 自由口通讯 VB PLC 监控界面 |
Design of the Communication Between Computer and S7-200PLC Based on VB6.0 |
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| Li Wei Zhao Jing Yang Cheng Li Ming. Design of the Communication Between Computer and S7-200PLC Based on VB6.0[J]. Programmable controller & Factory Automation(PLC & FA), 2008, 0(6): 59-62 |
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| Authors: | Li Wei Zhao Jing Yang Cheng Li Ming |
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| Affiliation: | Li Wei Zhao Jing Yang Cheng Li Ming |
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| Abstract: | Although specialized software have great function in the communication between computers and PLCs, but in many simple applications, its cost performance is not high. Therefore, based on VB6.0 and the free port communication protocol of S7-200 PLC , this article designed a kind of HMI which is simple and practical, by setting the MSComm build up the Communication between computer and PLC, digital signal and analog signal can be read/written/saved, and the analog signal can be shown by trend curve. |
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| Keywords: | Freeport communication VB PLC HMI |
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