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不同的PLC使用不同的編程軟件。但是對于任何一種軟件來說，編程前的第一步就是進行硬件組態，根據實際PLC的類型建立硬件配置及相應的通訊配置。硬件組態完成后，將之前在紙上記錄下來的I/O地址寫在軟件的符號表中。由于軟件不同，對于符號表的定義可能不同，但一般的軟件都有該功能，這一步是至關重要的。在編寫符號表時，不僅要把設備輸入輸出的絕對地址寫正確，再給每個地址命名并添加注釋，這對后面的編程會非常方便。不需要在編程時每次都查詢絕對地址，只要填寫命名好的名稱即可。當然，這也取決于軟件是否具備此功能。

在編程之前，一定要在草稿上寫出程序的流程圖。一個完整的程序，應該包括主程序、停止程序、急停程序、復位程序等部分，如果軟件允許，應該將各個程序按“塊”的形式編寫，即一個程序是一個塊，最終將每個塊按需求來調用即可。

PLC最擅長的就是處理順序控制，在順序控制中主流程是核心，一定要確保制定好的流程是正確的，要在草稿上仔細檢查。如果主流程存在問題，當程序被PLC執行后，很可能發生撞擊，損壞設備或對人身造成危險。 
Omron Output C500-OC223, New, Fast shipping

C500-DA004 New In Box Omron PLC Analog Out 3G2A5-DA004

Omron Position Control Module C500-NC103E

OMRON C500-CT021 NSFP C500CT021

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Omron C500-NC111-EV1 | $747.75 In Stock | C500NC111EV1

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DISPLAY TERMINAL by OMRON ELECTRONICS P/N C500-DT021-V1

OMRON C500-OA225 NSFP C500OA225

OMRON C500-CT012 USPP C500CT012

OMRON C500-ID212/C500ID212/3G2A5-ID212/3G2A5ID212 

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C500-ETL01 New In Box Omron PLC Input C500ETL01

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C500-LK203 New In Box Omron PLC Host Link 3G2A5-LK203

OMRON C500-PRW06 SYSMAC 28PIN P-ROM WRITER NIB

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Omron C500-OC224-E C500OC224E 32 Point Relay Output NIB