When multiple components are shared resources in a system, it might be critical to limit certain functionalities to a master caller during certain states.
An example would be where a pump is being controlled (Start-Stop) by a system and interlocks are to be put in place to disallow a remote call from stopping the pump while the owner system is in a critical state where pump should never be turned off. The system would reserve the component and be the sole caller which can change the state of this component. It could then release the component when it itself transitions to a maintenance mode, allowing for engineering/manual/test UIs to take control of the pump without causing a conflict during critical state.
francois-normandin
commented
7 years ago
When multiple components are shared resources in a system, it might be critical to limit certain functionalities to a master caller during certain states.
An example would be where a pump is being controlled (Start-Stop) by a system and interlocks are to be put in place to disallow a remote call from stopping the pump while the owner system is in a critical state where pump should never be turned off. The system would reserve the component and be the sole caller which can change the state of this component. It could then release the component when it itself transitions to a maintenance mode, allowing for engineering/manual/test UIs to take control of the pump without causing a conflict during critical state.