TMC MCCS Leaf Nodes Availability

1. TMC identifies and acts based on subsystem responsiveness.

2. To determine if a subsystem is responsive, TMC reads the state of subsystem devices from their respective Leaf Nodes.

   1. TMC calls the state() method on the Tango device proxy to check the device’s current state.

      1. This is a network operation.

      2. The operation will fail if the device is unreachable.

3. TMC uses this mechanism to collect responsiveness information of an MCCS Subarray/MCCS Master.

   1. The result is stored in the isSubsystemAvailable attribute of the TMC MCCS Leaf Node.

      1. True if the subsystem is reachable.

      2. False if the subsystem is not reachable.