In this article, a control system software is designed using digital PID algorithm, which realize real-time control, dynamic display, data record, parameter modulation and malfunction alert etc.
本文应用数字PID控制算法设计了控制系统的软件，实现了实时控制、动态显示、数据记录、参数调整以及故障报警等控制功能。
Three programming methods are put forward for malfunction alert handling . Practice confirms that these methods and measures improve the reliability of PLC control system.
从软件编程方面提出了三种故障报警处理的编程方法。实践证明，这些方法和措施对PLC控制系统的可靠性具有一定的提高和改进作用。
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