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1、目錄3.ST基本原理..........................................................................................................................73.1語言描述................................................................................

2、.........................................73.1.1語法圖......................................................................................................................73.1.2語法圖中的塊........................................

3、..................................................................73.1.3規(guī)則的意義（語義）..............................................................................................83.2基本元素的語言..................................

4、...........................................................................83.2.1ST字符組.................................................................................................................83.2.2ST中的標(biāo)識(shí)符........

5、.................................................................................................93.2.2.1標(biāo)識(shí)符的規(guī)則............................................................................................93.2.2.2標(biāo)識(shí)符舉例....

6、..........................................................................................103.2.3預(yù)留標(biāo)識(shí)符............................................................................................................103.2.3.1保

7、護(hù)標(biāo)識(shí)符..............................................................................................113.2.4數(shù)字和布爾值........................................................................................................173.2

8、.4.1整數(shù).........................................................................................................173.2.4.2浮點(diǎn)數(shù).................................................................................................

9、.....183.2.4.3指數(shù).........................................................................................................183.2.4.4布爾值.......................................................................................

10、...............183.2.4.5數(shù)字的數(shù)據(jù)類型......................................................................................193.2.5字符串.............................................................................................

11、.......................193.3ST源文件的結(jié)構(gòu)..........................................................................................................203.3.1語句.....................................................................

12、...................................................213.3.2注釋........................................................................................................................223.4數(shù)據(jù)類型...............................

13、............................................................................................233.4.1基本數(shù)據(jù)類型........................................................................................................233.4.1.1基本

14、數(shù)據(jù)類型..........................................................................................233.4.1.2基礎(chǔ)數(shù)據(jù)類型的值的范圍限制..............................................................253.4.1.3普通的數(shù)據(jù)類型..........................

15、............................................................263.4.1.4基礎(chǔ)系統(tǒng)數(shù)據(jù)類型..................................................................................273.4.2用戶定義的數(shù)據(jù)類型.............................................

16、...............................................273.4.2.1用戶定義的數(shù)據(jù)類型..............................................................................273.4.2.2用戶定義的數(shù)據(jù)類型的語法（類型聲明）..........................................283.4.2.

17、3基礎(chǔ)派生或派生的數(shù)據(jù)類型..................................................................293.4.2.4派生數(shù)據(jù)類型ARRAY.............................................................................303.7.4WHILE語句..............................

18、...............................................................................633.7.5REPEAT語句............................................................................................................643.7.6EXIT語句.....

19、............................................................................................................643.7.7RETURN語句.................................................................................................

20、..........653.7.8WAIFCONDITION語句........................................................................................653.7.9GOTO語句.......................................................................................

21、.......................673.8數(shù)據(jù)類型轉(zhuǎn)換...............................................................................................................673.8.1基礎(chǔ)數(shù)據(jù)類型轉(zhuǎn)換............................................................

22、....................................673.8.1.1隱式數(shù)據(jù)類型轉(zhuǎn)換..................................................................................683.8.1.2顯式數(shù)據(jù)類型轉(zhuǎn)換....................................................................

23、..............703.8.2補(bǔ)充的轉(zhuǎn)換............................................................................................................714.功能，功能塊和程序.........................................................................

24、.................................714.1創(chuàng)建和調(diào)用功能和功能塊...........................................................................................724.1.1定義功能.....................................................................

25、...........................................724.1.2定義功能塊............................................................................................................734.1.3FC和FB的聲明部分........................................

26、......................................................734.1.4FB和FC部分的語句..............................................................................................754.1.5功能和功能塊的調(diào)用.......................................

27、.....................................................764.1.5.1參數(shù)轉(zhuǎn)移的原則......................................................................................764.1.5.2轉(zhuǎn)移給輸入?yún)?shù)的參數(shù)..............................................

28、............................774.1.5.3參數(shù)轉(zhuǎn)移給inout參數(shù)..........................................................................784.1.5.4參數(shù)轉(zhuǎn)移到輸出參數(shù)（僅對(duì)FB）.........................................................794.1.5.5參數(shù)訪問時(shí)間.

29、.........................................................................................794.1.5.6調(diào)用一個(gè)功能..........................................................................................794.1.5.7調(diào)用功能塊（實(shí)例調(diào)用）......

30、................................................................804.1.5.8在FB外訪問FB輸出參數(shù).....................................................................814.1.5.9在FB外訪問FB輸入?yún)?shù).............................................

31、.........................824.1.5.10FB調(diào)用時(shí)的錯(cuò)誤源................................................................................824.2功能和功能塊的比較..................................................................................

32、.................834.2.1例子說明................................................................................................................834.2.2帶注釋的源文件..................................................................

33、..................................844.3程序...............................................................................................................................854.4表達(dá)式............................................

34、...............................................................................875.在SIMOTION中ST的集成.................................................................................................895.1源文件部分的使用............

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