Data Handling and Control Concept

This chapter addresses all the fact on the onboard software which an operator needs to know when controlling an FLP-based spacecraft from ground. The implemented onboard software objects tree is explained, from low level device handlers to the top level system object. Furthermore the command/reply flow through the onboard software and the onboard software object types are treated. The object modes and the specifics of controller objects are covered and many further details on object IDs, their addressing in commands and also on the onboard software dynamic architecture like tasks, cycle times and the polling sequence table and crash handling.