D.4.5 Power
Power for the redundant Gateways should be applied after all primary and secondary
Ethernet and RS-485 connections have been made. Using separate uninterruptable power
supplies (UPS) is recommended to ensure availability of the redundant Gateway system.
D.5 Diagnostics
The redundant system will perform many diagnostic checks to verify the health and
connectivity of the system. In the event of a failure, it can take up to 30 seconds for the
Gateway to trade positions.
Figure D-7: Redundancy Status (Diagnostics>Advanced>Redundancy Status)
These diagnostics can also be mapped to Modbus registers or OPC tags. The following
table covers what diagnostics are included on the Redundancy Status page as well as how
they can be mapped as parameters in Modbus or OPC.
Table D-1: Redundancy Diagnostics
Parameter Description Data type
REDUNDANT_HEALTH
Y
Overall redundancy status indicating the system is ready for a switch-
over
Boolean
RF_COVERAGE_FAILU
RE
Check to verify that both Gateways have the same RF coverage of the
wireless field network
Boolean
REDUNDANT_A_ONLI
NE
Operational status of Gateway A Boolean
Redundancy Reference Manual
September 2020 00809-0200-4420
92 Emerson.com/Rosemount
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