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49
System Back-Up
1. How the IRC back-up system works
The IRC system incorporates a back-up system.
One of the satellites can be designated to serve as a back-up master.
When both the master and back-up master are in order, the system works in the following
sequence:
1) Each satellite sends updated GLU/PBLU data to the master.
2) The master receives the data, processes it and sends it back to the satellite.
3) The satellite sends the updated data to the back-up master.
4) The back-up master receives the data, processes it and sends it back to the satellite.
If the master breaks down, the back-up master serves as the master after a master declaration
procedure is made at the back-up master. If the back-up master breaks down, the updated data
transmission to it can be stopped by a master declaration at the master. When the master or
back-up master recovers from the breakdown, it resumes its function as the master or back-up
master by the recovery declaring operation.
1) Updated data
3) Updated data
2) Processed data
4) Processed data
Satellite
Back-up master
Master
(Processing)
(Processing)
4
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