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搜题/搜资源
【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。 ( )
①
正确
②
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
查看完整题目与答案
【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
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【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
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【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
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【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
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【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
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【单选题】
CPU226型PLC本机I/O点数为( )
①
14/16
②
44118
③
44059
④
24/16
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【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
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【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
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【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
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错误
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随机题目
【单选题】
They _ on the programme for almost one week before I joined them, and now we on it as no good results have come out so far.
①
had been working; are still working
②
had worked; were still working
③
have worked; were still working
④
have worked; are still working
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【单选题】
Many people who had seen the film were afraid to go to the forest when they remembered the scenes ___ people were eaten by the tiger.
①
that
②
by which
③
which
④
in which
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【单选题】
A candidate for the democratic presidential nomination ______ at this moment.
①
is interviewing
②
being interviewed D. Interviewing
③
is being interviewed
④
Interviewing
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【单选题】
___ is often the case, we have worked out the production plan.
①
Which
②
When
③
What
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As
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【单选题】
There are many people ___ only on-line activity is sending and receiving e-mails.
①
who
②
that
③
which
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whose
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【单选题】
On his 10th birthday,Marty manages to escape from the zoo and gets onto the subway, ___ he believes that he can go to the wild.
①
which
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from what
③
through which
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that
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【单选题】
He ___________ his friends for their help at the hotel now.
①
entertained
②
was entertaining
③
is entertained
④
is entertaining
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【单选题】
___ is reported in the newspaper, talks between the two countries are making progress.
①
It
②
As
③
That
④
What
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【单选题】
They are living with their parents for the moment because their own house __________.
①
is being rebuilt
②
has been rebuilt
③
is rebuilt
④
has rebuilt
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【单选题】
在下列核算组织程序中,被称为最基本的会计核算组织程序的是( )
①
记账凭证核算组织程序
②
汇总记账凭证核算组织程序
③
科目汇总表核算组织程序
④
日记总账核算组织程序
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