可编程控制器单项选择题k
单选题
1.1969年，（ A ）研制出了第一台可编程控制器PDP-14，在GM公司的生产线上试用成功，由此诞生了可编程控制器。
A．美国DEC公司 B.日本欧姆龙公司
C.德国西门子公司
D.日本三菱公司
A
2．早期的可编程控制器对工业现场环境适应性较好，指令系统简单，一般只具有（ C ）的功能。
A．联网通信 B.数值运算 C.逻辑运算 D.模拟量控制
C
3. 早期的可编程控制器主要由( B )组成。
A. 微处理器
B.分立元件和中小规模集成电路
C. 单片机
D.大规模集成电路
B
4．下列关于PLC的说法，（ C ）是错误的。
A．编程方便，易于使用
B．适应性强，应用灵活
C．不能用于工业现场环境
D．可实现计数功能
C
5．（ B ）是PLC的核心，它指挥PLC有条不紊地进行工作。
A．存储器 B.CPU C.电源 D.输入输出接口
B
6．用户程序存放在PLC的（ D ）上。
A．中央处理器 B.输入输出接口
C．编程器 D.存储器
D
7．PLC中（ B ）用来连接被控对象中各执行元件，如接触器、电磁阀、指示灯、调节阀、调速装置等。
A．中央处理器 B.输出接口
C．编程器 D.输入接口
B
8．PLC中（ C ）的作用是供用户进行程序的编制、编辑、监视和调试。
A．中央处理器 B.输入输出接口
C．编程器 D.存储器
C
9．PLC通过（ D ）可以与监视器、打印机、其它的PLC或计算机相连。
A．中央处理器 B.输入输出接口
C．编程器 D.通信接口
D
10．各种按钮、开关、继电器触点等的开关量信号通过（ B ）接收和采集到PLC内部。
A．中央处理器 B.输入接口
C．输出接口 D.存储器
B
11．PLC的工作方式是（ D ）。
A 等待工作方式
B 中断工作方式
C 定时工作方式
D 循环的顺序扫描工作方式
D
12．集中输入方式指在扫描周期的开始或结束将所有输入信号采集并存放到（ A ）中。
A．输入映像寄存器 B.输出映像寄存器
C．输入端子 D.用户程序存储器
A
13．集中输入方式下，执行用户程序所需输入状态均在（ A ）中取用。
A．输入映像寄存器 B.输出映像寄存器
C．输入端子 D.用户程序存储器
A
14．PLC的系统程序不包括（ D ）
A.管理程序
B.供系统调用的标准程序模块
C.用户指令解释程序
D.开关量逻辑控制程序
D
15．世界上第一台PLC生产于（ C ）。
A． 1968年德国 B．1967年日本C．1969年美国 D.1970年法国
C
16． CPU 逐条执行程序，将执行结果放到( B )。
A输入映象寄存器B输出映象寄存器 C 中间寄存器 D辅助寄存器
B
17．立即输入方式下，程序执行需要哪个输入信号就从（ A ）取用。
A．输入端或输入模块 B.输入映像寄存器
C．中间寄存器 D.辅助寄存器
A
18．立即输出方式下，执行用户程序时将该输出结果向（ C ）输出。
A．输出锁存器 B.输出映像寄存器
C．输出端或输出模块 D.辅助寄存器
C
19．PLC梯形图的扫描原则是（ A ）扫描。
A．先左后右、先上后下 B.先下后上、先左后右
C. 并行同步
D.先输出后输出
A
20．下列关于PLC中断的说法，错误的是（ B ）。
A．PLC的中断响应在相关程序块结束后查询有无中断申请
B．PLC的中断响应在每条指令结束时查询有无中断申请
C．PLC的中断有优先级
D．PLC的中断无嵌套
B
21．下列关于PLC中断的说法，错误的是（ B ）。
A．PLC的中断响应在相关程序块结束后查询有无中断申请
B．中断服务程序的执行结果的输出与CPU的扫描周期脱离
C．多中断源有优先级
D．多中断源可以有嵌套关系
D
22．下列关于PLC中断的说法，错误的是（ B ）。
A．PLC的中断响应在相关程序块结束后查询有无中断申请
B．中断服务程序的执行结果的输出与扫描周期的输出阶段同步
C．多中断源有优先级
D．多中断源无嵌套关系
B
23．下列关于PLC中断的说法，正确的是（ B ）。
A．PLC的中断响应在每条指令结束时查询有无中断申请
B．中断服务程序的执行结果的输出与CPU的扫描周期脱离
C．多中断源没有优先级
D．多中断源可以有嵌套关系
B
24．在扫描周期的输出刷新阶段，输出映像寄存器中所有输出继电器的状态（接通/断开）转存到（ A ）中，通过一定方式输出，驱动外部负载。
A.输出锁存器
B.中间寄存器
C.辅助寄存器
D.输出模块A
25．CPU214型PLC本机I/O点数为（ A ）。
A.14/10
B.8/16
C.24/16
D.14/16
A
26．CPU212型PLC本机I/O点数为（ D ）。
A.14/10
B.8/16
C.24/16
D.8/6
D
27．CPU216型PLC本机I/O点数为（ C ）。
A.14/10
B.8/16
C.24/16
D.14/16
C
28．下述关于PLC编程器的说法，错误的是（ C ）。
A．PLC正式运行时不需要编程器
B．在PLC调试时编程器可作监控及故障检测
C．个人计算机不能作编程器使用
D．简易袖珍的编程器只能用指令表方式输入
C
29．下列（ D ）属于双字寻址。
A.QW1
B.V10
C.I0.0
D. VD28
D
30．下列（ A ）属于位寻址。
A.I0.0
B.VB2
C.AC0
D. AIW3 A
31. 下列（ A ）属于位寻址。
A.M0.0
B.VB2
C.AC0
D. AIW3 A
32．只能使用字寻址方式来存取信息的寄存器是（ D ）。
A．S B．I C．Q D．AIW
D
33．SM是（ D ）的标识符。
A．高速计数器 B．累加器 C．辅助继电器 D．特殊标志位
D
34．（ A ）是累加器的标识符。
A．AC B.HSC C.AIW D. SM
A
35. （ M ）是辅助继电器的标识符。
A．AC B.HSC C.M D. SM
C
36.（ D ）的标识符是V。
A．累加器 B.输入继电器
C.辅助继电器
D. 变量寄存器
D
37．定时器预设值PT采用的寻址方式为（ B ）
A.位寻址
B.字寻址
C.字节寻址
D.双字寻址
B
38．AC是（B ）的标识符。
A 高速计数器
B 累加器
C 内部辅助寄存器
D 特殊辅助寄存器
B
39．在PLC运行时，总为ON的特殊存储器位是（C ）。
A SM1.0
B SM0.1
C SM0.0
D SM1.1
C
40．PLC由STOP转为RUN时，（ B ）ON一个扫描周期。
A SM1.0
B SM0.1
C SM0.0
D SM1.1
B
41．下列（ A ）属于字节寻址。
A.VB10
B.VW10
C.ID0
D. I0.2
A
42. 若采用S7-200 CPU212的T37定时器，要定时10s，则其设定值应取为（ A ）。
A. 100
B. 10
C.1000
D.10000
A
43. 若采用S7-200 CPU212的T37定时器，要定时100s，则其设定值应取为（ C ）。
A. 100
B. 10
C.1000
D.10000
C
44. 若采用S7-200 CPU212的T33定时器，要定时10s，则其设定值应取为（ C ）。
A. 100
B. 10
C.1000
D.10000
C
45. 若采用S7-200 CPU212的T33定时器，要定时100s，则其设定值应取为（ D ）。
A. 100
B. 10
C.1000
D.10000
D
46. 若采用S7-200 CPU212的T42定时器，要定时5s，则其设定值应取为（ B ）。
A. 500
B. 50
C.5000
D.50000
B
47. 若采用S7-200 CPU212的T42定时器，要定时1s，则其设定值应取为（ B ）。
A. 100
B. 10
C.1000
D.10000
B
48. 若采用S7-200 CPU212的T35定时器，要定时60s，则其设定值应取为（ C ）。
A. 600
B. 60
C.6000
D.60000
C
49. 若采用S7-200 CPU212的T35定时器，要定时10s ，则其设定值应取为（ C ）。
A. 100
B. 10
C.1000
D.10000 C
50. 对如图所示的PLC 接线图，当SW1闭合时，相当于I0.0的（ A ）。
A ．常开触点闭合，常闭触点打开
B ．常开触点打开，常闭触点打开
C ．常开触点闭合，常闭触点闭合
D ．常开触点打开，常闭触点闭合 A
51. 对如图所示的PLC 接线图，当SW1
A ．常开触点闭合，常闭触点打开
B ．常开触点打开，常闭触点打开
C ．常开触点闭合，常闭触点闭合
D ．常开触点打开，常闭触点闭合 D
52．对如图所示的PLC 接线图，当Q0.0
）。
A ．常开触点闭合，常闭触点打开
B ．常开触点打开，常闭触点打开
C ．常开触点闭合，常闭触点闭合
D ．常开触点打开，常闭触点闭合
A
53．对如图所示的PLC 接线图，当Q0.0单元为“0”时，相当于Q0.0的（ D ）。
A ．常开触点闭合，常闭触点打开
B ．常开触点打开，常闭触点打开
C ．常开触点闭合，常闭触点闭合
D ．常开触点打开，常闭触点闭合 D
54．如图所示梯形图对应的指令表语句为（ C A ．LD I0.1 B. A I0.1 C. LDN I0.1 D. AN I0.1 C
55. 如图所示梯形图对应的指令表语句为（ A ）。
A ．LD I0.1 B. A I0.1 C. LDN I0.1 D. AN I0.1 A
56. 执行如下指令后，PLC 逻辑栈顶的内容为（ D ）。
24V I0.1
LD I0.0
A I0.1
LD Q0.1
A I0.1
OLD
A．(I0.0+I0.1)*(Q0.1+I0.1)
C. I0.1
D.(I0.0*I0.1)+(Q0.1*I0.1)
D
57. 执行如下指令后，PLC逻辑栈顶的内容为（ A ）。
LD I0.0
O I0.1
LD Q0.1
O I0.1
ALD
A．(I0.0+I0.1)*(Q0.1+I0.1)
C. I0.1
D.(I0.0*I0.1)+(Q0.1*I0.1)
A
58．JMP n 这条指令中，n的取值范围是（ D ）。
A 0-128
B 1-64
C 0-256
D 0-255
D
59.PLC子程序必须以（ D ）指令结束。
A．RETI B.MEND C.END D.RET
D
60. PLC中断程序必须以（ A ）指令结束。
A．RETI B.MEND C.END D.RET
A
61.（ B ）指令表示n号子程序的开始位置。
A.INT n
B.SBR n
C.LBL n
D.CALL n
B
62. （ C ）指令表示n号中断程序的开始位置。
A. LBL n
B.SBR n
C. INT n
D.CALL n C
63．顺序控制状态开始指令的操作符是( A )。
A． LSCR B。 SCR C。 SCRE D。 SCRT
A
64. 顺序控制状态转移指令的操作符是( D )。
A LSCR
B SCRP
C SCRE
D SCRT
D
65．顺序控制状态结束指令的操作符是( C )。
A LSCR
B SCRP
C SCRE
D SCRT
C
66．若整数的加减法指令的执行结果发生溢出则影响（ B ）位。
A SM1.0
B SM1.1
C SM1.2
D SM1.3
B
67．图示程序中的累加器用的是（ B ）寻址方式。
A.位寻址
B.字节寻址
C.字寻址
D.双字寻址
B
68．若整数的乘/除法指令的执行结果是零，则影响（ A ）位。
A SM1.0
B SM1.1
C SM1.2
D SM1.3
A
69．若累加器AC0的内容为4000，AC1的内容为6000，I0.0的内容为1，则执行如下指令后，AC1的内容为（ a ）。
A．10000 B.4000 C.6000 D.2000
A
70. 若累加器AC0的内容为4000，AC1的内容为6000，I0.0的内容为1，则执行如下指令后，AC0的内容为（ B ）。
A．10000 B.4000 C.6000 D.2000
B
71. 若VW10的内容为41，VW202的内容为4000，I0.0的内容为1，则执行如下指令后，VW200的内容为（ C ）。
A．97 B.4000 C.23 D.41
C
72. 若VW10的内容为41，VW202的内容为4000，I0.0的内容为1，则执行如下指令后，VW202的内容为（A）。
A．97 B.4000 C.23 D.41
A
73.PID回路指令操作数TABLE可寻址的寄存器为（ C ）。
A.I
B.M
C.V
D.Q
C
74. PID回路指令操作数LOOP可用范围为（ D ）。
A.0～127
B.0～31
C. 0～15
D.0～7
D
75．执行下面一段程序对应的时序图为（ A ）。
LD I0.0
EU
= M0.0
LD I0.0
ED
= M0.1
A． B.
C. D.
A
76．执行下面一段程序对应的时序图为（ D ）。
LD I0.0
= M0.0
LD I0.0
ED
= M0.1
A． B.
C. D.
D
77．执行下面一段程序对应的时序图为( aA )。
A ． B.
C. D.
A
78. 执行下面一段程序对应的时序图为（ A ）。
A ． B. C. D. A 79．执行下面一段程序对应的时序图为（ A ）。
A ． B. C. D. AA 80．当数据发送指令XMT 的使能端（ A ）时将执行该指令。
A.为1 为0 C.由1变0 D.0变1 A
81.在自由口通信模式下，通信协议完全由用户程序来控制，对PORT0，通过（ A ）来设置波特率及奇偶校验。
A.SMB30
B.SM29
C.SM31
D.SM130 A
82. 当数据接收指令RCV 的使能端（ A ）时将执行该指令。
A.为1
B.为0
C.由1变0
D.由0变1
（ ） I0.0 I0.1 Q0.0 Q0.0 Q0.0 Q0.0 Q0.0 I0.1 I0.0 Q0.0 I0.1
I0.0
Q0.0 Q0.0 Q0.0 I0.1 I0.0 Q0.0 I0.1
I0.0
A
83．执行下面一段程序后计数器C0的当前值为（ D ）。
A. 7
B. 4
C. 1
D. 3 D
84. 执行下面一段程序后计数器C0的状态位为（ C ）。
A. 0
B. 4
C. 1
D. 3 C
初一英语单项选择题专练题及答案
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英语单项选择经典真题演练
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______ you free last night？ A. Were B. Was C. Are D. Do [解析]last night应于过去式连用。因为它表示具体的过去时间。又因主语为you，故选A. 例题5. 词语解释 I‘m so glad to see you. A. sad B. angry C. pleased [解析]glad意为高兴的选项中只有pleased有此意，故选C. An elephant is a large animal. A. big B. tall C. heavy [解析]large意为大的，只有选项A与其意相近，故选A. This shop sells a lot of things. A. little B. many C. some [解析]a lot of的意思是许多的，只有选项B与其相同，故选B. 这3道题的目的为选意义相同或相近的词，这就要求同学们在学习英语的过程中注意这类词的相互联系。学习生词时力求用过去学的词或短语来解释。
做好英语单项选择题的方法
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初中英语单项选择题附答案
初中英语单项选择题附答 案
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初中英语单项选择题汇总题(附标准答案)
初中英语单项选择题汇总题(附答案)
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初中英语单项选择练习题
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