Glossary

available

To determine if the subsystem is available, currently TMC calls the state() method on the Tango device proxy to check the device’s current state. This is a network operation and will fail if the device is unreachable. TMC SubarrayNode reports the availability of the attribute - isSubarrayAvailable

isSubarrayAvailable

Each TMC sub-array node has an availability attribute ‘isSubarrayAvailable’. This attribute can be subscribed by client to read the availability status of the sub-array. The sub-array is said to be available only if all the critical systems it controls are available (SDP and CSP ,MCCS sub-array devices). TMC sub-array node Availability attribute is ‘true’ only if all below conditions are satisfied :

  1. SDP sub-array leaf node is reachable (through the reading State of device), and reports its availability attribute as true on isSubsystemAvailable.

  2. CSP sub-array leaf node is reachable (through the reading State of device), and reports its availability attribute as true on isSubsystemAvailable.

  3. Third condition is based on Telescope, whether it is Low or Mid:

    • For Low: MCCS sub-array leaf node is reachable (through the reading State of device)

    • For Mid: Dish subarray leaf node is reachable (through the reading State of device)

TRL

It stands for Tango Resource Locator. Check ADR-9 for more details.