不同的PLC使用不同的编程软件。但是对于任何一种软件来说，编程前的第一步就是进行硬件组态，根据实际PLC的类型建立硬件配置及相应的通讯配置。硬件组态完成后，将之前在纸上记录下来的I/O地址写在软件的符号表中。由于软件不同，对于符号表的定义可能不同，但一般的软件都有该功能，这一步是至关重要的。在编写符号表时，不仅要把设备输入输出的绝对地址写正确，再给每个地址命名并添加注释，这对后面的编程会非常方便。不需要在编程时每次都查询绝对地址，只要填写命名好的名称即可。当然，这也取决于软件是否具备此功能。

在编程之前，一定要在草稿上写出程序的流程图。一个完整的程序，应该包括主程序、停止程序、急停程序、复位程序等部分，如果软件允许，应该将各个程序按“块”的形式编写，即一个程序是一个块，最终将每个块按需求来调用即可。

PLC最擅长的就是处理顺序控制，在顺序控制中主流程是核心，一定要确保制定好的流程是正确的，要在草稿上仔细检查。如果主流程存在问题，当程序被PLC执行后，很可能发生撞击，损坏设备或对人身造成危险。 
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