DNP3 Application Layer request and response headers contain function codes. The function codes include read, write, select, operate, and direct_operate. The dnp3-req-func-code context identifies these function codes which are 1 byte in length.

Additional Details


Context Capture

In this example, the function code ‘Select’ has hex value 0x03. In the custom application, a decimal equivalent of 3 will have to be defined.

Recommended For You