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ON-LINE CONFIGURATION
OPERATION
I-E96-202B
B - 5
This information is provided for status purposes. Follow the
backup cycle procedures to perform on-line configuration.
Figure B-1. Backup MFP Module Operating Cycle
1
BACKUP
EXT
10
PRIMARY
EXT
CONFIGURATION
IS COPIED TO
THE BACKUP
RESET
(NO CHANGE)
INITIALIZE
EEROM
CFG
BUSCLK
RESET (CONFIGURATION NOT COPIED)
BUSCLK
BUSCLK
CFG
CHECKPOINT DATA
IS COMPLETE
RESET
(CHANGES MADE)
CHECKPOINT
DATA IS
COMPLETE
EXT
EXT
2
BACKUP
CFG
4
BACKUP
EXT
5
BACKUP
EXT
9
PRIMARY
EXT
6
BACKUP
EXT
7
BACKUP
EXT
8
BACKUP
EXT
3
BACKUP
ERR
CFG
BUSCLK
REQUEST
SHUTDOWN
OF PRIMARY
STEP
ROLE
MODE
TP50244A
LEGEND:
EXT:
= EXECUTE MODE
CFG
= CONFIGURATION MODE
ERR
= ERROR MODE
= LOSS OF BUS CLOCK
BUSCLK
Table B-3. Primary Cycle
Primary
Backup
Procedure
n
01xx0x0x
n+1
10xx1x0x
✲
1. The primary MFP module is actively controlling the process. (This represents
the same juncture as Step 5 of the backup cycle.)
n+1
01xx0x0x
n
11xx1x0x
✲
✲
2. When the shutdown request is received from the backup MFP module (Step 8
of the backup cycle), the primary MFP module stops executing and removes the
bus clock (BUSCLK).
n+1
01xx0x0x
n
01xx1x0x
✲
✲
3. The primary MFP module is now acting as the hot backup (n+1). All old con-
figuration and block output information remains intact from when it is shut down
in Step 2. If the new configuration is not operating as expected, the primary MFP
module, currently acting as the hot backup (n+1), can take control using the old
configuration and block output information (returns to Step 1).