Communication via serial interfaces

CODESYS supports serial communication with different methods depending on the device configuration:

• COM port via function library:
  The free Serial_Communication library is supplied with the CODESYS Development System. This library is used for the simple administration of COM ports (RS232 / RS 422 / RS485) as well as the reading/writing of data from the controller application.
• Modbus Serial (RTU) via own configurator:
  You can simply use the COM port of a CODESYS-compatible controller for Modbus communication (master/slave). For this purpose, use the seamlessly integrated Modbus configurator. If the controller does not come with the required license, this license can be obtained from the CODESYS Store subsequently.
• SPI / I²C / 1-Wire^® via runtime system component:
  Especially on standard device platforms, users can expand the available memory or functionality by means of serial data buses or communication interfaces. CODESYS supports SPI (Serial Peripheral Interface), I²C (Inter-Integrated Circuit), as well as 1-Wire thanks to components of the CODESYS Control Runtime System that can be integrated into the CODESYS Development System via corresponding drivers.
• Own serial protocols:
  If your device has a low-level device driver that you can address in the application, you can develop your own serial communication protocols using the programming functionalities of a modern programming tool (IDE).