【单选题】在 STEP 7-Micro/WIN 中,用软件改变 PLC 的运行方式(运行、停止),对用户程序进行编译等操作的主菜单是( )。
【简答题】This is Mr. Smith. He is from America. He is in Beijing now. He teaches us English in our school. He often wears(穿) a white shirt and black pants. He can speak a little Chinese. He likes teaching in C...
【判断题】PLC处于运行模式时,PLC采用的是一个不断循环的顺序扫描工作方式执行用户梯形图程序的。( )
【简答题】My name is Susan. I am from the Australia. I am six years old. I’m a student in No.1 Middle School. I have a happy family. We live in Fuzhou now. My father is a cook. He often cooks delicious food...
【判断题】投资方从联营企业分回利润的已纳税款,可以从投资方应纳所得税税额中全部扣除。
【单选题】This is _____ Chinese teacher. He is very good to us. [ ]
【单选题】PLC程序运行的基本方式是采用扫描原理,程序扫描顺序是_____。I.输人通道信号处理; II.用户程序执行; III.包括自诊断在内的内部处理;IV.与其他微处理器或编程器之间进行通信; V. 输出处理。
【单选题】PLC进入运行状态后,从存储器中读取程序的方式是: