【单选题】【消耗次数:1】
PLC的输入和输出量有开关量和模拟量两种。开关量I/O用最大I/O通道数表示,模拟量I/O点数用最大I/O点数表示。 ( )
正确
错误
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相关题目
【单选题】 PLC的输入和输出量有开关量和模拟量两种。开关量I/O用最大I/O点数表示,模拟量I/O点数用最大I/O通道数表示。 ( )
①  正确
②  错误
【单选题】 PLC的输人和输出量有开关量和模拟量两种。开关量I/ 0用最大I/ 0点数表示,模拟量I/ 0点数用最大I / 0通道数表示。( )
①  正确
②  错误
【单选题】 PLC的I/O点数是指_______。
①  输出信号个数
②  输入信号个数
③  输入信号个数+输出信号个数
④  输入信号个数-输出信号个数
【单选题】 I/O总点数是指输入信号和()的数量。
①  输出信号
②  存储信号
【判断题】 I/O点数是选择PLC的重要依据之一。当系统的I/O点数不够时,必须重新需用其他型号的PLC。
①  正确
②  错误
【单选题】 CPU226型PLC本机I/O点数为( )
①  14/10
②  8/16
③  24/16
④  14/16
【单选题】 CPU226型PLC本机I/O点数为( )
①  14/16
②  44118
③  44059
④  24/16
【判断题】 I/O点数指可编程控制器输入点数和输出点数的总和。
①  正确
②  错误
【单选题】 如需要3路模拟量输入1路模拟量输出,在S7-200系列PLC中应选( )模块。
①  EM222
②  EM235
③  EM223
④  EM243
【判断题】 泵站的数据采集一般含开关量,模拟量和脉冲量().
①  正确
②  错误
随机题目
【单选题】 Mary: How do you like Professor White’s lecture? John: ____
①  He talked about economy.
②  He teaches Class 2 students.
③  Very much.
④  He is a middle-aged professor.
【单选题】 I will give this dictionary to ____ wants to have it.
①  whomever
②  someone
③  whoever
④  anyone
【单选题】 The mountain is ____ 6.3 kilometers high, but it is not the highest one.
①  nearly
②  near
③  neat
④  neatly
【单选题】 A new teacher was sent to the village in place of ____ one who had retired.
①  a
②  the
③  an
④  Its
【单选题】 ____ was evident that Mr. Wang had come back to Shanghai.
①  This
②  He
③  That
④  It
【单选题】 Jack, the boss, asked Steven to leave — ____, she was filed.?
①  whats more ?
②  in addition?
③  on the contrary ?
④  D. in other words ?
【单选题】 He’s never again written ____ as his first one.
①  so good a book
②  such good a book
③  such good book
④  so a good book
【单选题】 “Where do you suggest going?” “We promised ____ the children to the West Lake.”
①  taking
②  to take
③  taken
④  took
【单选题】 Don’t be too ____ about things you are not supposed to know. ?
①  strange ?
②  amusing ?
③  curious ?
④  conscious?
【单选题】 To their surprise, they had much ____ and they even went to the same college. ?
①  in the same ?
②  in common ?
③  all the same ?
④  common things ?