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Reference Manual
00809-0100-4021, Rev FB
August 2011
Rosemount 3144P
4-2
F
OUNDA
TION
Fieldbus
GENERAL BLOCK
INFORMATION
Device Description
Before configuring the device, ensure the host has the appropriate Device
Description file revision. The device descriptor can be found on the
F
OUNDATION
fieldbus page on www.rosemount.com. As of February 2011, the
current revision of the Rosemount 3144P with F
OUNDATION
fieldbus protocol is
device revision 2.
Node Address
The transmitter is shipped at a temporary (248) address, to enable
F
OUNDATION
fieldbus host systems to automatically recognize the device and
move it to a permanent address.
Modes
The Resource, Transducer, and all function blocks in the device have modes
of operation that govern the operation of the block. Every block supports both
automatic (AUTO) and out of service (OOS) modes, and other modes may
also be supported.
Changing Modes
To change the operating mode, set the MODE_BLK.TARGET to the desired
mode. After a short delay, the parameter MODE_BLOCK.ACTUAL should
reflect the mode change, if the block is operating properly.
Permitted Modes
It is possible to prevent unauthorized changes to the operating mode of a
block by configuring MODE_BLOCK.PERMITTED to allow only the desired
operating modes. It is recommended that OOS always be selected as one of
the permitted modes.
Types of Modes
For the procedures described in this manual, it is helpful to understand the
following modes:
AUTO
The functions performed by the block will execute. If the block has any
outputs, these will continue to update. This is typically the normal
operating mode.
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 3144P. For
more information, see the Function Block manual (Document No.
00809-0100-4783).
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