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某央企电工技术比武试题,你会吗?

  • 2026-03-29 07:59:55
某央企电工技术比武试题,你会吗?
一、题意要求：
1、设备有三个电磁阀，三个电机。一个电磁阀和一个电机组成一组，共三组分为两用一备。三组设备各有一个远程故障开关。其他按钮若干。
2、启动要求：启动时电磁阀先启动，延时3秒电机启动。停止时电机先停止，延时5S后电磁阀停。
3、控制要求：
（1）有手动和自动功能切换显示，手动时指示灯常亮，自动时指示灯间隔1秒闪烁。显示指示灯1个。
（2）手动时，三组设备可以单独手动启动，满足启停要求。
（3）自动时，按下启动按钮，第一组启动（满足启停要求），延时10秒第二组启动（满足启停要求）。停止时两组设备同时停止（满足启停要求）。当两组设备都启动后，按下一组设备的远程故障开关，对应这组设备停止（满足启停要求），同时备用设备启动（满足启停要求）。远程故障开关取消时，备用设备停止（满足启停要求），对应设备启动（满足启停要求）。
4、使用西门子PLC300/400软件编程并进行仿真试验。

二、编程思路分析：
1、在OB1里编程主程序：
（1）编辑复位程序：PLC上电初始化程序，M区与Q区全部为0.调用FC82.
（2）编辑闪烁程序。
（3）编辑手自动切换程序。调用FC1与FC2
（4）编辑输出指示灯，会使用中间继电器代替法。
2、在FC1编写手动程序调用FC3
3、在FC2编写自动程序调用FC3、FC4、FC5.
4、在FC3中编写阀与电机延时启停程序。
5、程序块结构图如下：
三、程序编程
1、建立项目：2021年维护电工技术比武项目。
      创建FC1块，编写手动程序。创建FC2块，编写自动程序。创建FC3块，编写阀与电机延时启停程序。FC4与FC5为或逻辑、与逻辑块。FC82为系统功能块初始化程序。编写FC4与FC5程序。

2、首先编写FC3块程序，阀与电机延时启停。
（1）、编辑接口变量：输入部分与输出部分。

（2）、按下启动按钮，触发阀得电自锁，触发启动命令自锁。定时器得电延时3S后电机运行。
（3）、按下停止按钮，电机复位，触发停止命令自锁。定时器得电后延时5S后阀复位。
3、编辑FC1手动程序，从FC1中调用FC3三次，赋值绝对地址。
A设备延时启停程序
B设备延时启停程序
C设备延时启停程序
4、编辑FC2自动程序，从FC2中调用FC3三次，赋值绝对地址。加入自动连锁启停程序。
5、编写OB1程序
声明

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  1. CONNECT:[ UseTime:0.000513s ] mysql:host=127.0.0.1;port=3306;dbname=c_15386;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000505s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.032895s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000615s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000600s ]
  6. SELECT * FROM `set` [ RunTime:0.025145s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000694s ]
  8. SELECT * FROM `article` WHERE `id` = 457838 LIMIT 1 [ RunTime:0.004788s ]
  9. UPDATE `article` SET `lasttime` = 1775237273 WHERE `id` = 457838 [ RunTime:0.002024s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.005653s ]
  11. SELECT * FROM `article` WHERE `id` < 457838 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.058722s ]
  12. SELECT * FROM `article` WHERE `id` > 457838 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.100952s ]
  13. SELECT * FROM `article` WHERE `id` < 457838 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.104639s ]
  14. SELECT * FROM `article` WHERE `id` < 457838 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.112271s ]
  15. SELECT * FROM `article` WHERE `id` < 457838 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.007784s ]
0.563754s