当设备异常或检测装置发出事故信号时，PC按程序进行异常事故显示、报警和处理。

PC will give a unusual accident display, alarming and treatment as programmed in case that the conveyer is out of normal order or any accident occurs in the detecting system.

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分析PX装置可燃气体检测报警系统存在的问题，阐述处理问题的办法，提出进一步改进的建议。

To analyze the problem in the flammable gas detective and alarm system in the PX plant and put forward some suggestions of more improvement.

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报警系统。侵入检测。事件控制器。与中央报警装置或电话报警送话器相结合的记录功能。

Alarm systems - Intrusion detection - Events controller-recorder function integrated in central alarm units or telephone alarm transmitters.

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