Sharp UP-600 - Manual (Page 49)

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2. Master declaration
— when the master or back-up master breaks down
When the master or back-up master breaks down, the master declaration procedure should be
performed to inform satellites of the breakdown.
(1) When the master breaks down — Master declaration at the back-up
master
1) A satellite detects a breakdown of the master through the system retry function when it is
sending updated GLU/PBLU data to the master. At this point, the message “NO REPLY/
MASTER” appears in the pop-up window of the display.
NO REPLY/MASTER
* For the system retry function, see pages 57 - 58 .
2) The master declaration operation must be done at the back-up master. This operation
informs the other satellites that the master has broken down and the back-up master will
serve as the master hereafter. (During this process, operations cannot be performed at
satellites.)
3) Each satellite in the IRC system starts sending updated GLU/PBLU data to the back-up
master.
4) The back-up master processes the received data and sends back the processed data to
each satellite.
Flow of a master declaration at the back-up master
1) Detection of a breakdown
3) Updated data
Satellite
(Processing)
4) Processed data
(Transmission stops.)
Master declaration
2) Master
declaration
Back-up master Master