Reference Manual
00809-0100-4021, Rev FB
August 2011
4-5
Rosemount 3144P
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Output Splitter (index number OSPL 2200)
The output splitter block provides the capability to drive two control outputs
from a single input. Each output is a linear function of some portion of the
input.
Arithmetic (index number 2100)
This block is designed to permit simple use of popular measurement math
functions. The user does not have to know how to write equations. The math
algorithm is selected by name, chosen by the user for the function to be done.
Signal Characterizer (index number 2000)
The signal characterizer block has two sections, each with an output that is a
non-linear function of the respective input. The non-linear function is
determined by a single look-up table with 21 arbitrary x-y pairs. The status of
an input is copied to the corresponding output, so the block may be used in
the control or process signal path.
RESOURCE BLOCK
Features and
Features_Sel
The parameters FEATURES and FEATURE_SEL determine optional
behavior of the 3144P.
FEATURES
The FEATURES parameter is read only and defines which features are
supported by the 3144P. Below is a list of the FEATURES the 3144P
supports.
UNICODE
All configurable string variables in the 3144P, except tag names, are octet
strings. Either ASCII or Unicode may be used. If the configuration device is
generating Unicode octet strings, you must set the Unicode option bit.
REPORTS
The 3144P supports alert reports. To use this feature, the Reports option bit
must be set in the features bit string. If it is not set, the host must poll for
alerts.
SOFT W LOCK and HARD W LOCK
Inputs to the security and write lock functions include the hardware security
switch, the hardware and software write lock bits of the FEATURE_SEL
parameter, the WRITE_LOCK parameter, and the DEFINE_WRITE_LOCK
parameter.
The WRITE_LOCK parameter prevents modification of parameters within the
device except to clear the WRITE_LOCK parameter. The block will function
normally updating inputs and outputs and executing algorithms while
WRITE_LOCK is in use. When the WRITE_LOCK condition is cleared, a
WRITE_ALM alert is generated with a priority that corresponds to the
WRITE_PRI parameter.
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