Emerson Rosemount 2460, Reference Manual

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Reference Manual
00809-0100-2460, Rev DE
Configuration
October 2018
Configuration
Take-over criteria
There may be situations when you would like the passive device to take over as the active device even if
no fail-over criteria is fulfilled. For example, in case the active device does not respond to Host requests,
the passive device may take over and become the active device. The Active doesn’t reply on Host port
option does not work if the Primary and Backup system hubs are wired to separate host ports which is
the case when, for example, using the RS232 communication interface.
Passive device communication
In case the Primary and Backup system hubs are connected to different ports on the host system, the
same Modbus address can be used for communication with the two system hubs. Then there is no need
to use individual Modbus addresses for the Primary and Backup devices. When communicating with a
host system via RS232 interface, separate host ports must be used, and the Allow Passive device to reply on
common Modbus address option needs to be enabled.
Finish the installation wizard
Once the redundancy configuration is finished:
1. In the 2460 System Hub Redundancy window, click the Next button.
2. Proceed with “Finish the installation” on page 69 to finish the installation wizard.