ABB 800xA Operation page 135

Section 6 Status Displays
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D/F
3BUR002418-600 A
– BACK-UP MEMORY
Status information for up to three Backup Memory Modules per Controller
Subsystem are shown in individual status blocks to the right of the status blocks
for the controllers they back up. Each field in a status block is a target. When
selected, it is highlighted and that Backup Memory Module becomes the object
of subsequent redundancy and display requests. (The highlighted backup
controller status block(s) in the CONTROLLERS area indicate(s) which set or
sets of up to four controllers are backed up by that backup memory module.)
Backup Memory Modules are assigned pseudo-subdevice numbers of 13 (OD),
14 (OE) and 15 (OF) since they are not actually on the DCN or F-Bus. The
only meaningful displays for use with Backup Memory Modules are the
Diagnostic Message Displays.
The backup memory status is shown in the status block as:
STATUS
– ?????? - Unknown (Red).
– UNKNOWN (Red).
– NOT AVAIL (Red).
– ACTIVE (Green).
BACKUP STATUS
– ?????? - No status received (Red).
– FAILED (Red).
– UNKNOWN (Red).
– ACTIVE (Yellow).
– READY (Green).
Each of these two fields is a target. When selected, it is highlighted and that
D/M Module becomes the object of subsequent redundancy and display
requests. D/M Modules are assigned pseudo-subdevice numbers of 30 (1E) and
31 (1F), rather than the subdevice number of 0 which is indicated on the
System Status Display, in order to distinguish messages from each D/F. The
Controller Node Subsystem Status Display
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