Sharp UP-800 (serv.man32) User Manual / Operation Manual ▷ View online
55
When the master or back-up master breaks down, the master declaration procedure should be taken to
inform satellites of the breakdown.
inform satellites of the breakdown.
(1) When the master breaks down – Master declaration at the back-up master
Flow of a master declaration at the back-up master
1) A satellite detects a breakdown of the master through the system retry function when sending
updated GLU data (and clerk data*) to the master. At this point, the message “MASTER DOWN?”
appears in the pop-up window of the display of the satellite.
(For the system retry function, see page 63–64.)
appears in the pop-up window of the display of the satellite.
(For the system retry function, see page 63–64.)
2) The master declaration operation must be done at the back-up master. This operation informs all
the satellites that the master has broken down and the back-up master will serve as the master
hereafter. (During this process, any other operation cannot be done at each satellite.)
hereafter. (During this process, any other operation cannot be done at each satellite.)
3) Each satellite in the IRC system starts sending updated GLU data (and clerk data*) only to the
back-up master.
4) The back-up master receives the data and sends back an acknowledgment signal to the satellites.
*Only for the centralized clerk file system
1) Detection of a breakdown
3) Updated data
Satellite
4) Acknowledgment signal
(Transmission stops.)
Master declaration
Back-up master
Master
2) Master
declaration
operation
declaration
operation
2. Master declaration
56
The master declaration procedure is as follows:
1.
Enter the PGM2 mode from the mode selection window.
2.
Select “DECLARATION” and press the
e
key.
The DECLARATION window will appear.
3.
Select “MASTER DECLARE” and press the
e
key.
While the master is down, the back-up master performs T-LOG polling as well.
NOTE
57
(2) When the back-up master breaks down – Master declaration at the master
Flow of a master declaration at the master
1) A satellite detects a breakdown of the back-up master through the system retry function when
sending updated GLU data (and clerk data*) to both the master and back-up master. At this point,
the message “BACKUP DOWN?” appears in the pop-up window of the display of the satellite.
the message “BACKUP DOWN?” appears in the pop-up window of the display of the satellite.
2) The master declaration operation must be done at the master. This operation informs all the
satellites of the breakdown of the back-up master.
3) Each satellite in the IRC system starts sending updated GLU data (and clerk data*) only to the
master.
4) The master receives the data and sends back an acknowledgment signal to the satellites.
*Only for the centralized clerk file system
The master declaration procedure is the same as “(1) When the master breaks down.”
1) Detection of a back-up master breakdown
3) Updated data
Satellite
4) Acknowledgment signal
(Transmission stops.)
Back-up master
Master
2) Master declaration
58
When the master or back-up master recovers from a breakdown, the recovery declaration operation should
be taken to inform satellites of the recovery.
be taken to inform satellites of the recovery.
(1) When the master recovers from a breakdown – Recovery declaration
at the back-up master
Flow of a recovery declaration at the back-up master
1) The recovery declaration operation is done at the back-up master.
2) Each satellite stops sending updated GLU data (and clerk data*) to the back-up master
temporarily.
3) The back-up master sends the updated GLU data (and clerk data*) files to the master.
4) The back-up master informs all satellites of the master's recovery.
5) The satellites restart sending updated GLU data (and clerk data*) to the master and the IRC
system returns to the normal state.
*Only for the centralized clerk file system
3) Updated data file
Satellite
4) Master
recovery
information
recovery
information
2) Transmission stops temporarily.
Recovery declaration
1) Recovery
declaration
operation
declaration
operation
Back-up master
Master
5) Restart of updated
data transmission
data transmission
3. Recovery declaration
Click on the first or last page to see other UP-800 (serv.man32) service manuals if exist.