Emerson PACSystems RX3i User Manual page 44

User manual
GFK-2892G
In Genius Duplex Redundancy, Discrete Output Blocks vote on the output data received
from both SBA #30 and #31. A configuration parameter Duplex Default State must be
configured for each output point. This parameter determines how the output will behave in
the event the commanded output states received from SBA#30 and SBA#31 disagree. Refer
to Genius I/O System and Communications User's Manual, GEK-90486-1, Chapter 8 for
details. Whenever one of the controlling devices at SBA#30 or SBA#31 becomes
unavailable, the output will be controlled by the remaining device. Discrete outputs in the
I/O controlled by the GR7 and GNIU also behave in this way.
The GCG001 can be used to achieve Genius Dual Bus Redundancy when used in conjunction
with application code provided by EMERSON. Please contact Customer Support for
assistance.
Ethernet Media Redundancy Protocol
PROFINET also supports redundancy in the form of Ethernet Media Redundancy Protocol
(MRP). As shown in Figure 28, this form of redundancy is designed to permit all devices on
the network to continue to communicate even though the network cable has been
compromised at one point. For details, refer to the PACSystems RX3i & RSTi-EP PROFINET
I/O Controller Manual, GFK-2571.
Figure 28: PROFINET Media Redundancy
System Operation
Chapter 4
Sep 2019
39