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.
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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