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

OMRON C500-DA002 NSFP C500DA002

OMRON C500-OC224-E NSPP C500OC224E

OMRON C500-AD006 USPP C500AD006

OMRON C500-LK010-PE USPP C500LK010PE

C500-DA002 New In Box Omron PLC Analog Out 3G2A5-DA002

C500-DA101 New In Box Omron PLC Analog Output C500DA101

OMRON C500-CT012/3G2A5-CT012 COUNTER UNIT ***XLNT***

OMRON C500-RM001-PEV1 NSFP C500RM001PEV1

Omron Interface module C500-LK203, Fast shipping

Omron Output C500-OD411, New, Fast shipping

OMRON C500-PS211-E NSPP C500PS211E

OMRON C500-RT002-EV1 NSFP C500RT002EV1

OMRON C500-PRW06 USPP C500PRW06

OMRON C500-MD211CN USPP C500MD211CN

Omron C500-CT021 Counter Unit C500CT021

OMRON C500-PRW06 P-ROM WRITER PLC MODULE NEW IN BOX

OMRON C500-AD001/3G2A5-AD001 A/D UNIT 2 POINT 1-5V*NNB*

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

OMRON C500-AD001 USPP C500AD001

Omron C500-CT021 Counter Unit C500CT021

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 

Omron C500-NC111-V1/C500NC111V1 Pulse Output

C500-ETL01 New In Box Omron PLC Input C500ETL01

Omron C500-GPC04 3G2C5-GPC04-E C500GPC04 3G2C5GPC04E

OMRON C500-OD415-CN NSFP C500OD415CN

OMRON C500-ZL3AT1-E NSFP C500ZL3AT1E

OMRON C500-AD007 USPP C500AD007

OMRON C500-ASC01 USPP C500ASC01

OMRON C500-DA002 USPP C500DA002

C500 OC224 E / 3G2A5 OC224 E OMRON NEW C500OC224E

OMRON C500-OC224 NSFP C500OC224

C500-RT002-EV1 Omron PLC New In Box 3G2A5-RT002-EV1

C500-RT201 Omron PLC New In Box 3G2A5-RT201

OMRON C500-PS211-E USPP C500PS211E

Omron C500-NC111-EV1 Servo Single Axis Stepper Module

Omron Link unit C500-LK009-V1, Fast shipping

Omron Output C500-OC223, Used, Fast shipping

Omron Remote I/O C500-RT002-EV1, Fast shipping

Omron Remote I/O C500-RT001-PV1, Fast shipping

Omron Input C500-IA122, Fast shipping

C500-OA225 New I Box Omron PLC Triac Output 3G2A5-OA225

C500 ID215 3G2A5 ID215 OMRON NEW C500ID215 3G2A5ID215

OMRON C500-PS211 USPP C500PS211

OMRON C500-ID215 NSFP C500ID215

OMRON C500-OC224 NSPP C500OC224

OMRON C500-OC223 NSFP C500OC223

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

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

OMRON C500-OA225 USPP C500OA225

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