The system integrates network and multimedia technique into itself and provides the subsystems of malfunction alert and expert diagnostic system.

该系统具有故障报警及专家诊断系统，从而实现了电台管理的自动化和远程网络化。

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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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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。

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