ABB Ability 800xA Series User Manual page 111

B Technical Reference
B.6 Redundancy
Table B.2: Redundancy Behavior
(Continued)
Fault Condition
7 TCP connection
lost between
primary device and
secondary device.
8 Redundancy link
broken or removed
between primary
device and
secondary device.
1. This fault condition may also result in a cyclic reboot of the secondary device.
2. If the secondary device reboots cyclically in this state, set the TCP acknowledge timeout (object 22223)
to a smaller value.
In any case, the fully redundant state will be obtained again when the secondary device
indicates "operational" (refer to
are complete. In highly populated, tightly configured H1 links, it may take several minutes
to acquire the live lists. Before the live lists are completed, redundancy switching is
possible but client server connections can only be established to H1 devices that are in
the live list.
Any further error that occurs before the fully redundant state is reached, may cause the
system to fail.
2PAA114135-610
Fault Detection
Time-out on TCP
connection.
Detection time less than
2 s during activity and less
than 7 s during idle times.
Loss of serial
communication.
Detection time less than
800 ms.
Fault
Treatment
Secondary
device
assumes and
indicates
non-operational
2
state
Secondary
device
assumes and
indicates
non-operational
state.
Status Indicators - LEDs on page
Effect Repair Measures
System Repair Ethernet
degrades to connection.
non-redundant
Secondary device
system.
may reboot in some
Secondary
cases depending on
device
prior state and will
clears
receive
configuration.
configuration data
from primary device.
System Repair or reconnect
degrades to redundancy link.
non-redundant
Secondary device
system.
will reboot and
receive
configuration data
from primary device.
37) and its H1 live lists
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