At the same time there are keyboard and display circuit and alarm system ,which is for setting and displaying parameter in advance and alarming the system malfunction .
同时系统设有键盘/显示电路和指示报警系统，用于指示过程控制状态和系统故障报警。
参考来源 - 基于波控技术的CO·2,447,543篇论文数据，部分数据来源于NoteExpress
The latter makes use of zero sequence voltage detection, alarm and display circuit.
信号报警显示部分由零序电压检测、报警、显示等电路构成。
The operating principle of its PWM circuit, current display circuit and sequence timer circuit etc. are described.
论述了PWM电路、电流显示电路、程序时间调节控制电路等的工作原理。
The music by the SCM system is the smallest system and the planned expansion of LED display circuit and voice circuit.
该音乐门铃系统是由单片机最小系统及扩展LED显示电路和语音电路组成。
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