【单选题】【消耗次数:1】
输入和输出继电器的触点可使用()次。
无限
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相关题目
【判断题】 输入和输出继电器的触点可使用无限次。
①  正确
②  错误
【单选题】 输出继电器的线圈能使用()次 。
① 
② 
③ 
【判断题】 外部输入/输出继电器、内部继电器、定时器、计数器等器件的触点不可多次重复使用。
①  正确
②  错误
【判断题】 PLC输入和输出继电器的编址通常都是二进制。
①  正确
②  错误
【单选题】 PLC所有软继电器的触点可以( )次使用
①  256
②  无限
【单选题】 PLC所有软继电器的触点可以( )次使用
①  有限
②  >256
③  无限
④  <2048
【判断题】 LD指令和LDI指令的操作元件可以是输入继电器X、输出继电器Y、辅助继电器M、状态继电器S、定时器T、和计数器C、中的任何一个。
①  正确
②  错误
【单选题】 输出继电器(Y) 能够由外部信号驱动。
①  正确
②  错误
【单选题】 FX2系列输出继电器代号是____。
①  X
②  Y
③  S
④  M
【单选题】 FX2N的输出继电器最多可达(????)点?。
①  128
②  64
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随机题目
【单选题】 Fortunately, Jack was only slightly injured in the traffic ____ .
①  incident
②  event
③  case
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【单选题】 I want to paint the wall, but I can’t ____ on the color. ?
①  design ?
②  decide ?
③  desire ?
④  detect?
【单选题】 The book I ____ the other day can be found nowhere.
①  borrow
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【单选题】 Her parents objected to ____ that farmer, though he has a lot of money.?
①  her marrying ?
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③  marry ?
④  her marrying with?
【单选题】 Tom, what did you do with my documents? I have never seen such a____ and disorder!
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【单选题】 —Could I borrow your dictionary? —I’d get it for you ____I could remember who last borrowed it.
①  except that
②  unless
③  only if
④  if only
【单选题】 No one thought that John’s suggestion was worth ____.?
①  ?to consider ?
②  considering ?
③  to be considered ?
④  of consideration?
【单选题】 We must ____ that our customs and habits are different from theirs.
①  keep up with
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【单选题】 20. Only when he had handed in his exam paper ____ he had made several mistakes.
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【单选题】 People’s hearts ____ the children whose parents died in the accident.
①  went out for
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