Run Control (1)

Overview

• Hierarchy of run controllers
• Expect one controller per crate in our system
• Finite state machine: Initial, Loaded, Configured, Running, Paused (plus error states etc)

Synchronisation

• Parent controllers makes transition before its children
• Parent can initiate state transitions in its children either all in parallel, or in forward/reverse order
• No communication between child controllers
• Limited synchronisation possible by inserting extra levels in the run control hierarchy.
• Expect to use this in our system for the TTC