text: <s>[INST] CIP Messaging in Studio. Is anyone aware of a CIP document that lists your parameter fields shown above (Service Code, Class, etc.) and what the numbers correspond to? [/INST] There are two places: 1. The Rockwell knowledgebase has many of these outlined for various use cases and products: https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/748424. 2. The CIP specification (published by ODVA) lists standard class codes and the services each class supports.  Rockwell products make extensive use of the standard spec but any vendor can adapt the spec for their own specific use cases.\n </s>