Emerson Rosemount 3144P, Reference Manual

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135
Reference Manual
00809-0100-4021, Rev JA
Configuration
April 2017
Configuration
Out of service (OOS)
The functions performed by the block will not execute. If the block has any outputs, these will typically
not update and the status of any values passed to downstream blocks will be “BAD”. To make changes to
the configuration of the block, change the mode of the block to OOS, and when the changes are
complete, change the mode back to AUTO.
MAN
In this mode, variables that are passed out of the block can be manually set for testing or override
purposes.
Other types of modes
Other types of modes are Cas, RCas, ROut, IMan, and LOW. Some of these may be supported by different
function blocks in the transmitter. For more information, see the Function Block
Reference Manual .
Note
When an upstream block is set to OOS, it will impact the output status of all downstream blocks. The
figure below depicts the hierarchy of blocks:
4.3.4 Link Active Scheduler (LAS)
The Rosemount 3144P can be designated to act as the backup LAS in the event that the designated LAS
is disconnected from the segment. As the backup LAS, the transmitter takes over the management of
communications until the host is restored.
The host system provides a configuration tool specifically designed to designate a particular device as a
backup LAS. Otherwise, this can be configured manually as follows:
1. Access the Management Information Base (MIB) for the transmitter.
To activate the LAS capability, enter 0x02 to the BOOT_OPERAT_FUNCTIONAL_CLASS object (Index
605). To deactivate, enter 0x01.
2. Restart the device.
4.3.5 Capabilities
Virtual Communication Relationship (VCRs)
There are 20 VCRs, where one is permanent and 19 are fully configurable by the host system. Also, thirty
link objects are available.
Resource block
Transducer
block
Analog Input
(AI block)
Other
function
blocks