Synchronized Data Transfers; I/O Bus Topologies; Genius Dual Bus I/O Capacity - Emerson PACSystems RX3i User Manual

User Manual
GFK-2409B
assumes that each device has been configured for either BSM present or for long timeout.)
Then the output device will begin using output data from the other GBC.
2.5

Synchronized Data Transfers

Data may be synchronized from the Master to the Backup on a continuous basis in order to
assure that the Backup controller's data is always in sync with the Master's. Max-ON
RX3isupports up to 6 groups of synchronization data for each data type listed below. The
groups do not have to be contiguous. Each group is specified by a starting reference address
and a length. For each data type, the lengths are added together, and the sum must not
exceed the value in the corresponding column below.
Max
Length
Range
2.6

I/O Bus Topologies

The Max-ON RX3i application supports the use of single (non-redundant) and/or dual
(redundant) busses interfacing to the I/O devices.
•
Note
•
Redundant busses are superior to non-redundant busses when there is a requirement to
protect against cable failures or Genius bus controller failures.
When the primary consideration is to protect against cable failures, then the system
designer should consider separating the cables so that a single mechanical failure does not
damage both cables.
2.7

Genius Dual Bus I/O Capacity

The maximum allowable I/O capacity for Max-ON RX3i redundant system that is configured
for Genius Dual busses is as follows:
System Overview
Registers %R Discrete Outputs %Q Internal Coils %M Analog Outputs %AQ
8000 2048
1 - 8000 1 - 2048
A Max-ON RX3i controller supports up to four Ethernet LANs. At least one Ethernet
Interface must be dedicated to the Synchronization Link. This allows up to 3
additional Ethernet Interfaces that may be used as dedicated Ethernet I/O LANs.
Support is also available for a single duplex Ethernet I/O LAN.
Simplex Ethernet I/O Busses
Up to 3
Redundant IP on the Primary and Secondary Synchronization LANs is not available
Max-ON RX3i supports up to four redundant Genius LANs or up to eight non-
redundant Genius LANs, or a mixture of the two. However, the system may not have
more than eight Genius bus controllers in a Controller.
Simplex Genius I/O Busses
Up to 8
4096
1 - 4096
Dual Ethernet I/O Busses
1
Dual Genius I/O Busses
Up to 4
Chapter 2
Oct 2019
256
1 - 256
11