109-C09FDE1C-1-4G現(xiàn)貨
主營(yíng):品牌的PLC 、DCS 系統(tǒng)備件 模塊
①Allen-Bradley(美國(guó)AB)系列產(chǎn)品》
②Schneider(施耐德電氣)系列產(chǎn)品》
③General electric(通用電氣)系列產(chǎn)品》
④Westinghouse(美國(guó)西屋)系列產(chǎn)品》
⑤SIEMENS(西門(mén)子系列產(chǎn)品)⑥銷(xiāo)售ABB Robots. FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、Panasonic Robots、MOTOMAN Robots
⑦estinghouse(西屋): OVATION系統(tǒng)、WDPF系統(tǒng)、MAX1000系統(tǒng)備件
⑧Invensys Foxboro(??怂共_):I/A Series系統(tǒng),F(xiàn)BM(現(xiàn)場(chǎng)輸入/輸出模塊)順序控制、梯形邏輯控制、事故追憶處理、數(shù)模轉(zhuǎn)換、輸入/輸出信號(hào)處理、數(shù)據(jù)通信及處理等。
Invensys Triconex: 冗余容錯(cuò)控制系統(tǒng)、基于三重模件冗余(TMR)結(jié)構(gòu)的現(xiàn)代化的容錯(cuò)控制器⑨Siemens(西門(mén)子):Siemens MOORE, Siemens Simatic C1,Siemens數(shù)控系統(tǒng)等
⑩Bosch Rexroth(博世力士樂(lè)):Indramat,I/O模塊,PLC控制器,驅(qū)動(dòng)模塊等。
⑾Motorola(摩托羅拉):MVME 162、MVME 167、MVME1772、MVME177等系列
) 臨時(shí)變量
臨時(shí)變量?jī)H在邏輯塊運(yùn)行時(shí)有效,邏輯塊結(jié)束時(shí)存儲(chǔ)臨時(shí)變量的內(nèi)存被操作系統(tǒng)另行 分配。S7將臨時(shí)變量定義在L堆棧中,L堆棧是為存儲(chǔ)邏輯塊的臨時(shí)變量而專(zhuān)設(shè)的。當(dāng)塊程序運(yùn)行時(shí),在L堆棧中建立該塊的臨時(shí)變量,一旦塊執(zhí)行結(jié)束,堆棧重新分配,因而信息丟失。
邏輯塊局部數(shù)據(jù)的數(shù)據(jù)類(lèi)型
在變量聲明表中,要明確局部數(shù)據(jù)的數(shù)據(jù)類(lèi)型,這樣操作系統(tǒng)才能給變量分配確定的 存儲(chǔ)空間。局部數(shù)據(jù)可以是基本數(shù)據(jù)類(lèi)型或復(fù)式數(shù)據(jù)類(lèi)型,也可以是專(zhuān)門(mén)用于參數(shù)傳遞 的所謂的“參數(shù)類(lèi)型”。參數(shù)類(lèi)型包括定時(shí)器、計(jì)數(shù)器、塊的地址或指針等,見(jiàn)表5.2。表5.2 參數(shù)類(lèi)型變量
參數(shù)類(lèi)型 大 小 說(shuō) 明
定時(shí)器(Timer) 2 B 在功能塊中定義一個(gè)定時(shí)器形參,調(diào)用時(shí)賦予定時(shí)器實(shí)參
計(jì)數(shù)器(Counter) 2 B 在功能塊中定義一個(gè)計(jì)數(shù)器形參,調(diào)用時(shí)賦予計(jì)數(shù)器實(shí)參
塊:
Block_FB
Block_FC
Block_DB
Block_SDB 2 B 在功能塊中定義一個(gè)功能塊或數(shù)據(jù)塊形參變量,調(diào)用時(shí)給功能塊類(lèi)或數(shù)據(jù)塊類(lèi)形參賦予實(shí)際的功能塊或數(shù)據(jù)塊編號(hào),如
FC 101、DB 42
指針(Pointer) 6 B 在功能塊中定義一個(gè)形參,該形參說(shuō)明的是內(nèi)存的地址指針。例如,調(diào)用時(shí)可給形參賦予實(shí)參P#M50.0,以訪(fǎng)問(wèn)內(nèi)存M50.0
ANY 10 B 當(dāng)實(shí)參的數(shù)據(jù)類(lèi)型未知時(shí),可以使用該類(lèi)型
1) 定時(shí)器或計(jì)數(shù)器參數(shù)類(lèi)型
在功能塊中定義一個(gè)定時(shí)器或計(jì)數(shù)器類(lèi)型的形參,功能塊就能使用一個(gè)定時(shí)器或計(jì)數(shù)器,而不需明確具體的定時(shí)器或計(jì)數(shù)器,等到調(diào)用該功能塊時(shí)再確定定時(shí)器或計(jì)數(shù)器號(hào)。這使用戶(hù)程序能靈活性地分配和使用定時(shí)器或計(jì)數(shù)器。當(dāng)給定時(shí)器或計(jì)數(shù)器參數(shù)類(lèi)型形參分配實(shí)參時(shí),在“T”或“C”后跟一個(gè)有效整數(shù),如T 100。
2) 塊參數(shù)類(lèi)型
當(dāng)定義一個(gè)作為輸入輸出的塊時(shí),參數(shù)聲明決定了塊的類(lèi)型(FB、FC、DB等)。當(dāng)為塊參數(shù)類(lèi)型形參分配實(shí)參時(shí),可以使用物理地址,如FC 101,也可使用符號(hào)地址,如“valve
3) 指針參數(shù)類(lèi)型
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