ABB Ability 800xA Series User Manual page 110

B Technical Reference
B.6 Redundancy
Table B.2: Redundancy Behavior
(Continued)
Fault Condition
4 Secondary device
fails due to
• permanent
hardware fault
• transient
hardware fault
• software fault
5 Ethernet cable
broken between
secondary device
and Ethernet
hub/switch.
6 H1 cable broken
between
secondary device
1
and H1 network.
2PAA114135-610
Fault Detection
Device fails completely or
• software watchdog
expires or
• hardware watchdog
expires or
• exception occurs or
• failure in H1 interface
detected.
Bad link status of Ethernet
port detected.
Detection time less than
500 ms.
No fault detection in
secondary device.
Empty live list has to be
detected by any HSE
client (e. g. asset monitor).
Fault
Effect
Treatment
Secondary System
device degrades to
assumes and non-redundant
indicates system.
non-operational
state.
Secondary System
device degrades to
assumes and non-redundant
indicates system.
non-operational
state.
None. No
redundancy
concerning
the affected
H1 link.
Repair Measures
Transient fault:
Automatic reboot
Permanent fault:
Replace device
Secondary device
will reboot and
receive
configuration data
from primary device.
Repair or reconnect
Ethernet cable.
Secondary device
will reboot and
receive
configuration data
from primary device.
Repair or reconnect
H1 cable.
110