Executive Model of Petri Net Applied in the PLC Control Program 应用于PLC控制程序的Petri网执行模型
NET CLR. The virtual machine is used to maintain the run-time environment which is composed of code section, frame stack, function stack, constant section, instruction pointer, etc and control the executing of program. NETCLR的思想,用虚拟机维护由代码区、框架栈、函数运行栈、常量区和指令计数器等共同构成的运行时环境,控制程序的执行。
This paper introduces an design for automatic detecting the line quality on PCB, which is based on the net list, and by the electrical test technology and computer control technology. Results from the test are processed by the computer program. 本文介绍了以印刷电路板的网络表为基础,运用电子测量和计算机控制技术,实现了对印刷电板上的连线质量进行由程序控制的自动化检测,检测数据经计算机处理得出检测结果。
PROFIBUS net is the core of this system, PLC is the control subject, computer is the work platform of system write program 、 defend 、 monitor control and manage. 该系统以PROFIBUS现场总线为核心,以可编程控制器PLC为控制主体,以计算机为系统编程、组态、维护、监控和管理的一体化工作平台。
Here design scheme exploring the net of some real time dynamic image in industrial control process is discussed, including data signal acquisition and application program interface, selection of common dynamic Web server development modes. 讨论了工业控制过程中对一些实时动态图象在网上浏览的设计方案,包括数据信号的采集及应用程序接口设计;常见的动态Web服务器开发方式的选择;