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从零到一:学徒如何快速掌握西门子PLC编程技能?

  • 2026-01-29 18:09:41
从零到一:学徒如何快速掌握西门子PLC编程技能?

从零到一.:学徒.如何快速掌握西..子PLC编程技能?

.天我们来.聊聊.西门.子PLC编程的快速入门.方法..直接说重点:...别急着.研究高.级功...先从输入输出接.线和基本.梯形..始。.

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一、搞懂PLC的“耳朵”和“嘴巴”

PLC的输.入点就像..器的“耳朵”.,用来.接收按钮、传.感器的信号;输出点则是“嘴巴”,控制.电机、指示灯等执行.器。

硬件接.线.注意: - 输入点..常接开关.信号.,24V居多,分清PNP(共负极).和N.PN.(共正.极)接法 - 输出.点分.继电器型和晶.体管型,.继电..型可接交流负载,晶体.管型开关...高 - .必在断电.状态下接线!.我见过学.徒带电.接线打.火花,烧了三.个输入点

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二、梯形图:电工都看得懂的语言

梯形图是.从继.电器控制电路演..来的,左边是“火线”,右边是“零线.”,中.间是各种触点。

梯形图

网络1:启动保持电路

|  I0.0   |  I0.1   |   Q0.0   |

|  启动   |  停止   |  电机   |

|--[ ]----|--[ ]----|--( )-----|

|         |         |          |

|  Q0.0   |         |          |

|--[ ]----|         |          |

注释.:I.0.0启动.按钮按.下,Q.0.0得电自.锁,直到.I0.1停止按钮按.

.键技.. 1. 每个网..最好只完成一个功能 2. 多用中间位.(M点)做状态标志 3. 定时器要分清脉冲型(TP)和.接通延时型.(TON).

3

三、实战案例:电机正反转控制

这里最容易犯错的.互锁,必须保证正转和.反转接触器不同时吸.合!

梯形图

网络1:正转控制

|  I0.0   |  I0.2   |  Q0.1   |  Q0.0   |

| 正转启动 |  停止   | 反转输出 | 正转输出 |

|--[ ]----|--[ ]----|--[ ]----|--( )---|

|  Q0.0   |         |         |        |

|--[ ]----|         |         |        |

网络2:反转控制(同样加入Q0.0的常闭触点互锁)

血的教训: 我见..没加互锁的,两个接.触器同时吸合直接.短路,.空开跳闸!

4

四、必须掌握的调试工具

  1. 在线监控
    ..看到每..点的实时状态,绿.色表示.接通
  2. 强制表
    :测..时手动给输入.点信号,.调试完一定取消强.制!
  3. .叉引用
    :查找某个.点在哪里被使..了,排查.故障神器

5

五、常见问题解决

问题1:程序下载后.不运行?. - 检查CPU是否在RUN模式 - 看诊.断缓冲区报错信息 - 确认硬.件组态与实际.一致

问题2:输入点有信.号但程序没反.应? - 用万用表量.输入点.电压 - 检查输入滤波时间.是否设得太长 - 确认地.址没错.,新手常.把I0.0写成I0

6

实践建议

从简单的启保..电路..始,.用按.钮和指示灯做实验。.接着做两台电机顺.序启动.,然后加定时器做延时控制。每个功.能单独测试通过.再组合。

找台淘汰的设备练手,.拆开看.别人怎么编程的。遇到报警别慌,查手册.的故障.代码表。.前三个月.每天写50行梯形图,坚.持下.来就能独..做项目了。

记住:PLC编程是.门手艺,多接线、多调试、多.思考...么这.样设计,比只看书.进步快十倍。

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  1. CONNECT:[ UseTime:0.000967s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001305s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.008421s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000685s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001342s ]
  6. SELECT * FROM `set` [ RunTime:0.001027s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001449s ]
  8. SELECT * FROM `article` WHERE `id` = 469390 LIMIT 1 [ RunTime:0.004185s ]
  9. UPDATE `article` SET `lasttime` = 1770518647 WHERE `id` = 469390 [ RunTime:0.004740s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.012476s ]
  11. SELECT * FROM `article` WHERE `id` < 469390 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.004250s ]
  12. SELECT * FROM `article` WHERE `id` > 469390 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.034451s ]
  13. SELECT * FROM `article` WHERE `id` < 469390 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.111614s ]
  14. SELECT * FROM `article` WHERE `id` < 469390 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.004642s ]
  15. SELECT * FROM `article` WHERE `id` < 469390 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.005509s ]
0.348461s