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S7-1200 PLC的编程指令

  • 2026-02-06 06:02:01
S7-1200 PLC的编程指令

S7-1200PLC

编程指令

S71200PLC的编程指令在西门子TIAPortal环境中使用,涵盖从基础到高级的功能。以下是结构化整理的关键指令和注意事项。

一、基本指令

1.位逻辑指令

常开触点(I0.0)、常闭触点(NOTI0.1)、线圈输出(Q0.0)。

置位(SET/复位(RESET):保持输出状态,直至被反向操作。

2.定时器与计数器

定时器:

TON(通电延时):输入接通后延时输出。

TOF(断电延时):输入断开后延时输出。

TONR(保持型):累计时间,需用RESET复位。

时间格式:使用S5T5S表示5秒(自动转换为毫秒)。

计数器:

CTU(加计数器):达到预设值后输出。

CTD(减计数器):减至0时输出。

CTUD(加减计数器):双向计数。

3.比较指令

支持数据类型:整数(INT)、双整数(DINT)、实数(REAL)。

操作符:==(等于)、<>(不等于)、><等,如CMP>MW10,100

4.数学运算

基础指令:ADD(加)、SUB(减)、MUL(乘)、DIV(除)。

高级函数:SQRT(平方根)、EXP(指数)等。

5.移动指令

MOVE:传输数据(自动处理兼容类型),如MOVEMW10,MW20

类型转换:需显式指令(如CONVERT_INT_TO_REAL)。

6.程序控制

跳转(JMP/LABEL)、子程序调用(CALL)、返回(RET)。

注意:S71200不直接支持MCR指令,改用逻辑结构控制。

二、高级指令

1.移位与循环

SHL/SHR(左/右移位)、ROL/ROR(循环移位)。

2.数据转换与处理

转换指令:如INT_TO_DINT

块操作:FILL_BLK(填充)、MOVE_BLK(复制)。

3.字符串处理

指令:CONCAT(连接)、LEFT/RIGHT(截取)、FIND(查找子串)。

4.通信指令

S7协议:PUT/GET(访问其他PLC数据)。

开放式通信:TSEND/TRCVTCP/UDP)。

5.工艺指令

高速计数器(HSC)、脉冲输出(PTO/PWM)。

PID控制:使用PID_Compact函数块(需配置工艺对象)。

6.诊断与中断

诊断:GET_DIAG读取错误信息。

中断:通过组织块(OB)处理(如时间中断OB10、硬件中断OB40)。

三、编程环境

支持语言:梯形图(LAD)、函数块图(FBD)、结构化文本(SCL)。

注意:S71200不兼容STL(语句表),需使用SCL进行高级文本编程。

四、常用编程指令

1.启保停电路(LAD

启动(I0.0)、停止(I0.1常闭),Q0.0自锁。

2.定时器应用

I0.2触发定时器,5秒后Q0.1接通。

3.比较指令(SCL

五、注意事项

数据类型匹配:操作数类型需一致,避免隐式转换错误。

定时器单位:使用S5T格式(如S5T5S)而非直接毫秒值。

通信配置:需在TIAPortal中预设连接参数(IP地址、端口等)。

PID调试:通过工艺对象视图配置参数,实时调节。

通过官方手册和TIAPortal的指令帮助可深入掌握细节,确保编程准确性和效率。

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  1. CONNECT:[ UseTime:0.000831s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001379s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000644s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.001643s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001425s ]
  6. SELECT * FROM `set` [ RunTime:0.000723s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001427s ]
  8. SELECT * FROM `article` WHERE `id` = 472051 LIMIT 1 [ RunTime:0.031309s ]
  9. UPDATE `article` SET `lasttime` = 1770448753 WHERE `id` = 472051 [ RunTime:0.013967s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000325s ]
  11. SELECT * FROM `article` WHERE `id` < 472051 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.005749s ]
  12. SELECT * FROM `article` WHERE `id` > 472051 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002055s ]
  13. SELECT * FROM `article` WHERE `id` < 472051 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.024813s ]
  14. SELECT * FROM `article` WHERE `id` < 472051 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.021643s ]
  15. SELECT * FROM `article` WHERE `id` < 472051 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.034135s ]
0.238315s