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西门子PLC编程新手必看:图形化编程与传统编程对比

  • 2026-02-05 01:04:10
西门子PLC编程新手必看:图形化编程与传统编程对比

西门子PLC编程新手必看:图形化编程与传统.编程对比.

大家好!作为一名.混迹..动化领域多.年的工..师,今天想聊聊.西门子.PLC编程中两个核心方.法:图形化编程和传..指令.表编程。记得我刚入行时,总纠.结该.学哪.个,.结果发.现两者就像“自动挡”和.“手动挡”汽车,各有各.的妙用!

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一、什么是图形化编程?

基本概.. 图形化编程主要指梯形图(L.AD)和功能块图(FBD).。梯形图.像电工控.制图,用触点、线圈等.符号.搭建逻辑.;功能块..则像搭积木,.把功能模块连起来。

实际应用. 比如用.梯形图控制一.台电机:- 常开触点.表示启动按钮 . - 常闭.触点表示..止按.- 线圈.代表电.机接..

优点. 直观.易懂,.调试时能看见..号流向..特别适合逻辑控制。.我曾用梯形图半.小时改好设.备流程,.厂里老师傅一看.就明白!

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二、什么是传统编程?

基本概... 传统.编程主.要指指令表(S.TL),类似汇编语.言,直接.对寄.存器操作。一条指令可能对应多个梯形.图元素.

代码示..

LD  I0.0      // 加载输入0.0的状态

AN  I0.1      // 与输入0.1的非状态

=   Q0.0      // 输出到Q0.0

实际应.. 复杂计算、数据批量处理时效率高。有次需.要处理.20.0个传感.器的.平均.值,用.指令表十几.行搞.定,.梯形图得.画半天。

3

三、核心对比

对比项..|图形化编程|传统编.| |–.--------.----..–|------------.------------|—.--------------..-| | 学..门槛 | 低,.适合电工转行.| 较高..需理解寄存器 | | 调试.便.利性 | 可实时.监控信号状.态 | 需查看.变量.表 | | 执.行效率.| 相对较低...| 直..高效..| | 适用.场景 | 逻辑控制、简单流程. | 复杂运算、算法 |

注意事项不要只学一.. 很多项目需要混合编.程 - 梯形图虽直观,但复杂时可能变.成“蜘蛛.网”. - 指令表调试时,记得多用注释,.不然三个月后自.己都看不懂

4

四、实战经验分享

  1. .动-.保持-停止.电路.. 用梯形图:.三个网络搞定.,一目了.然 . 用指令表:五条指令,简洁但抽象.

  2. 数据转换案例....把温度传感器值..换为实际温度.: . - 梯形图:..用多个数学功能块- 指令表:.直接使用浮.点运算指令,更紧凑

  3. 常见问题问题:梯.形图网.络过多导致扫描周期.解决.复杂.计算部分用指令.表重写教训:曾.因全用梯形图处.理数据,导致设备响应慢,被生.产线老师傅.催得满头汗!.

5

五、给新手的建议

  1. .梯形.图入门
    ,建立逻.辑控制.思维.
  2. 掌握.基本指令表
    ,至少.能读懂别人程序
  3. 混合使用.
    :主流程用梯形.图,.复杂计算用指令表
  4. 多用模拟.器调试
    ,西门子PLCSIM.很好.
  5. 保存调试记..
    .标注.每次修改的..

.操练习:用梯形.图和指....别实.现同..个功能.——按钮按.下三..后点亮.指示灯。.比较两者.差异,思.考各自优缺点..尝试在.同一个项.目中混合使用两种方法。

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  1. CONNECT:[ UseTime:0.000580s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000735s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.001789s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000339s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000569s ]
  6. SELECT * FROM `set` [ RunTime:0.004551s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000906s ]
  8. SELECT * FROM `article` WHERE `id` = 471644 LIMIT 1 [ RunTime:0.013332s ]
  9. UPDATE `article` SET `lasttime` = 1770477917 WHERE `id` = 471644 [ RunTime:0.018343s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.002856s ]
  11. SELECT * FROM `article` WHERE `id` < 471644 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.005856s ]
  12. SELECT * FROM `article` WHERE `id` > 471644 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.009948s ]
  13. SELECT * FROM `article` WHERE `id` < 471644 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.010900s ]
  14. SELECT * FROM `article` WHERE `id` < 471644 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.014388s ]
  15. SELECT * FROM `article` WHERE `id` < 471644 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.007187s ]
0.166790s