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7. BACKUP FUNCTION
EO1-11138
7-2
(2) Procedure
1) Changing Program Data (DLL from the PC)
7. BACKUP FUNCTION
PC
BM
DLL data
Response Response
Backup data
M
• When various center files from the PC are received via DLL, the master terminal (M) backs up program
data and sales data of the backup master terminal (BM) automatically and sends the result to the PC.
2) Changing Program Data (Operated on the Master Terminal)
M
Programming
Operation
• When various center files are being programmed on the master terminal (M) , the backup error flag of
the relevant file is turned on. (At this time, backup data is not updated.)
* For details about the backup error flag, refer to 5) Backup Error Flag.
* For an explanation of the backup data update process, refer to 6) Backup Data Update Process.
3) Updating Sales Data
• After each satellite terminal sends an affect data of which sales data is subject to the data backup to the
master terminal, the same data is sent to the backup master terminal and the sales data is updated.
4) Checking Backup Data
BM
Version data
Version request
M
• The master terminal (M) sends the version request command to the backup master terminal (BM) every
certain period of time and receives version information about the backup data.
• The master terminal (M) checks correspondence between the version information received from the
backup master terminal (BM) and the center files (stored in the M) . If an abnormality is found, the
backup error flag is turned on.
• When a master job is being performed on the master terminal (M) ([RTR] key turned on), or a PC job is
being performed backup data is not checked.
5) Backup Error Flag
• When there is any difference between the data stored in the master terminal (M) and the backup data
stored in the backup master terminal (BM), the master terminal (M) turns on the backup error flag of the
file in which a difference was found.
• There are the following five cases when the backup error flag is turned on.
1 The master terminal (M) changes the programming of the center files.
2 A version error is found at the backup data check.
3 The backup job fails after the center file has been downloaded from the PC.
4 Updating of the backup data fails after the center files have been reset.
5 Updating of the backup data fails after the center file (containing Read counter) has been read.
6 The backup master terminal (ID No. 2) is added to the terminal connection table.