Sharp UP-700, UP-600 Master declaration, when the master or back-upmaster breaks down

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

Master		Back-up master
		2) Master
		declaration
		(Processing)
		Satellite
	1) Detection of a breakdown	3) Updated data
	(Transmission stops.)	4) Processed data
		Master declaration

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