MODBUS examples

Examples how to build MODBUS TCP/Serial servers and clients using the CODESYS MODBUS function block library ModbusFB.compiled-library.

Product description

The examples are based of the ModbusFB.compiled-library and the ModbusFB non standard extensions.compiled-library included in the CODESYS MODBUS package.

ModbusFB_examples.project demonstrates how to build standard MODBUS TCP/Serial servers and clients using the ModbusFB.compiled-library.

ModbusFB_non_standard_extensions_examples.project demonstrated how to use the ModbusFB non standard extensions.compiled-library to build MODBUS TCP/Serial servers and clients with an extended "data model" (wide registers >16bit) not covered by the MODBUS standard, but used in real world MODBUS devices.

More information

ModbusFB_examples.project includes three applications on separate PLCs:

• Example_BasicOverview gets you an overview of the existing functions blocks anh how to use / combine the in ST / CFC
• Example_Serial demonstrates how to build MODBUS Serial servers and clients
• Example_TCP demonstrates how to build MODBUS TCP servers and clients

System requirements and restrictions