HJD63F400產(chǎn)品描述：
HJD63F400
聯(lián)系人：嚴(yán)小姐
手機(jī)：18030229052
電話：0592-5709823
傳真：0592-5709828
QQ 1093230189 以ASCII碼的形式在手持操作器和PLC之間傳遞命令和反饋信息。在PLC內(nèi)編寫了專門的無線控制程序，實現(xiàn)無線控制狀態(tài)下的數(shù)據(jù)通信及對機(jī)械手的控制。 無線數(shù)傳模塊的功能僅為實現(xiàn)PLC與手持操作器的無線通信功能，對于PLC與手持操作器中CPU而言，通過無線數(shù)傳模塊的無線通信與通過串行端口直接相連的有線通信兩種方式，在編程上是沒有任何差別的。 單片機(jī)與無線數(shù)傳模塊的通信接口則可以選擇三種接口模式中的任一種，既可以采用簡單的直接相連;為提高穩(wěn)定性，也可以采用232或485芯片進(jìn)行電平轉(zhuǎn)換后再與數(shù)傳模塊相連。為保持更好的可擴(kuò)展性，我們選擇了RS-232接口標(biāo)準(zhǔn)。
.手持操作器的設(shè)計 手持操作器的功能為通過處理器的數(shù)字IO及AD功能檢測按鈕及搖桿上的操作輸入，并將轉(zhuǎn)換后的數(shù)字信號進(jìn)行編碼后形成控制指令，通過無線數(shù)傳模塊發(fā)出。 XC166系列單片機(jī)是英飛凌科技（Infineon）的16 位微控制器產(chǎn)品，其優(yōu)異的內(nèi)核結(jié)構(gòu)，高效的指令集，以及不斷擴(kuò)充更新的產(chǎn)品線，使其廣泛應(yīng)用于汽車電子、工業(yè)控制和信息技術(shù)領(lǐng)域。該系列單片機(jī)具有豐富的接口模式，如14通道10位AD變換器，同步/異步串行通道USART，高速同步串行通道SPI，CAN模塊，79個IO引腳等，并可與各種設(shè)備組成通訊網(wǎng)絡(luò)。同時，該系列單片機(jī)適應(yīng)于惡劣的工業(yè)環(huán)境，工作溫度可在-40～125°C。[6]針對我們所設(shè)計的手持操作器的功能，我們選擇了XC166系列中的XC164CS型單片機(jī)。這樣只需附加極少的外圍硬件，就可以實現(xiàn)所需的功能，同時，使該遙控器具有工作性能穩(wěn)定和易于進(jìn)行功能擴(kuò)展的優(yōu)點。 手持操作器的功能模塊主要包括AD采樣功能，即采集搖桿操作產(chǎn)生的比例控制電壓;數(shù)字IO功能，即采集按鈕操作狀態(tài)和進(jìn)行一些功能狀態(tài)顯示;通訊功能，即定時地將采集到的控制指令按規(guī)定的格式編碼后通過串口以無線的方式發(fā)送。 手持操作器由電池供電，XC166系列單片機(jī)及無線數(shù)傳模塊可以滿足低功耗的要求。
數(shù)據(jù)可靠性 無線遙控操作系統(tǒng)必須保證數(shù)據(jù)傳輸?shù)母呖煽啃院涂刂频陌踩?，避免發(fā)生失控和錯誤控制指令現(xiàn)象，本系統(tǒng)主要通過以下幾方面來保證： 無線數(shù)傳模塊的高抗干擾能力和低誤碼率，高效前向糾錯信道編碼技術(shù); 串行通訊協(xié)議校驗，一般采用奇偶校驗; 軟件協(xié)議校驗;通過軟件編程，對發(fā)送的數(shù)據(jù)進(jìn)行校驗，可采用CRC校驗、交互確認(rèn)或多次發(fā)送對比的方式。在我們的程序中采用同一動作指令重復(fù)發(fā)送的方式，只有命令指令與確認(rèn)指令完全相同，PLC才接受指令，否則忽略此指令。這樣就完全避免了通信所產(chǎn)生的錯誤指令; PLC的“軟件看門狗”;在PLC程序中設(shè)置定時程序，當(dāng)超時未收到無線指令時，停止機(jī)械手動作，防止由于通訊中斷而使機(jī)械手失控; 通過以上四個措施，可以有效地保證無線遙控的可靠性，防止產(chǎn)生錯誤操作指令或機(jī)械手失控。 通過試驗證明，這種采用PLC和無線數(shù)傳模塊的遙控方式簡單可行，由于PLC及數(shù)傳模塊都有成熟的工業(yè)化產(chǎn)品，可靠性高，成本低，擴(kuò)展性好，因此本方案具有較高的實用價值，簡化了設(shè)計過程。但手持操作器中的單片機(jī)模塊尚需進(jìn)一步的工業(yè)化設(shè)計，以達(dá)到更高的工業(yè)可靠性要求，并實現(xiàn)總線通信、自檢驗等更多功能。
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Allen Bradley 1321-3LR100-B AC Line Reactor 13213LR100B 3 Phase 600V 0.3 mH 100A
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