The link below includes pre-configured Codesys v3 J1939 devices for the PKU2200, PKU2400, and PKU2600 switchpacks, as well as a function block which reads the button inputs and writes the requested values out to J1939 for the switchpack to respond to.

It also includes matching .eep configurations for each switchpack model. These configurations wait for a response from the controller before lighting the LEDs.

Codesys v3 J1939 PKU Devices with matching PKU configurations