Handling Of Redundancy Faults; Table 8 Primary And Backup Ip Address Setting - ABB LVS Digital Manual

HA ND LIN G OF R EDU NDA N CY FAULTS

6.3 Handling of redundancy faults

Both Digital Gateway always supervise the redundancy conditions, detecting faults and
problems according following table:
Event
PLC or DCS connection interrupted for more
than 1 second to Primary Digital Gateway
Power loss or internal error of Primary Digi-
tal Gateway
Power loss of backup Digital Gateway
Problems in redundancy setup
Switchgear Bus at Primary Digital Gateway
disconnected

Table 8 Primary and Backup IP address setting

A change over from Primary to Backup Digital Gateway will only be performed
if there is no redundancy error.
Nevertheless, it is also possible that the DCS/PLC initiates a change over by
sending respective change over command. It needs to be ensured that the
switch over commands are configured in Digital Gateway mapping for the
respective fieldbus.
2 8
Action
Redundancy change over if backup Digital
Gateway has an active PLC or DCS connec-
tion
Redundancy change over,
Redundancy error indi-
cated
No change over, Redun-
dancy error indicated
No change over possible,
Redundancy error indi-
cated
Redundancy change over
R EDU NDA NCY
1 TG C90 80 04