Hi, I created a FB that read JSON file and convert it to the normal DUTs with this library. May be usefull for somebody: https://github.com/Risele/CodesysJSONFile/ There are project at Win3 Virtual controller + exported code (normal .export and xml) Also I made some notes about library limitations I found. Leaving here for others. Naming The names in JSON and in ST-based JSONVARs should match exactly. For JSON fields of {"field":"value", "otherField":3.14 } ST-struct should be: TYPE JSONST STRUCT...