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电气测试题
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1.怎样设计一个PLC程序,给模拟量FLOAT1提供一个滤波器,滤波常数可调.2.怎样可以实现Siemens S400 与AB Control Logix PLC 交换数据?
3.看图”9112”回答问题:有哪些硬件及各自工作原理和作用?
4.设备的急停和接地作用有那些?
5.翻译: 4 wires are neceary for 1 E-stop with NC and NO, NC should be wire to terminal blocks in the main control cabinet and NO should be wire to remote I/O boxes to simplify detection of tripped or failed devices, All interlocked Guards, Light Curtains, Safety Mats, or other presence sensing devices shall be part of the hardwired E-Stop circuit.Bypaing of these devices is acceptable to support non-automatic function.In non-robotic word cells, these are typically string-up mode, inch mode, etc.6.画出三相交流电机380V AC, 10KW星三角形接触器控制主回路及控制回路.7.某发电机的电压互感器的变比为10kV/100V（线电压），电流互感器的变比为1000A/5A，功率变送器的额定输入电压和额定输入电流分别为AC 100V 和5A，额定输出电压为 DC ±10V，模拟量输入模块将DC ±10V 输入信号转换为数字+27648 和-27649。设转换后得到的数字为N，求以kW 为单位的有功功率值.
