The following note presents the LHCb experiment control system (ECS) FSM based architecture. It is a guide to specify the FSM that should be implemented in all sub detector control system in order to provide the LHCb global ECS system with a common look and feel and behaviour in all its sub detectors.
The hierarchical control architecture model used is presented together with the various ECS domains identified in order to split the LHCb control system in a limited set of homogeneous areas of control. Then the FSM describing the common standardized states and possible transitions published by all controllers in each of those domains are described. Finally a design process is proposed to support a step by step implementation and test of the sub detector control systems.

Architecture Guidelines