Emerson Rosemount OCX8800C Manual page 164

F Fieldbus
™
OUNDATION
April 2023
augmentation of the range extended input. All operations are selected by parameter and
input connection.
Figure 8-24: Arithmetic (ARTHM) Function Block
The nine arithmetic functions are: flow compensation linear, flow compensation square
root, flow compensation approximate, BTU flow, traditional multiply and divide, average,
summer, fourth order polynomial, and simple HTG compensate level.
This arithmetic function block supports mode control (Auto, Manual, or Out of Service).
There is no standard alarm detection in this block.
Table 8-28: Arithmetic (ARTHM) Block
Index number Parameter
4 ALERT_KEY
29 ARITH_TYPE
30 BAL_TIME
31 BIAS
21 BIAS_IN_1
23 BIAS_IN_2
25 BIAS_IN_3
164
Units Description
None The identification number of the plant unit. This
information may be used in the host for sorting
alarms, etc.
None The set of 9 arithmetic functions applied as
compensation to or augmentation of the range
extended input.
Seconds Specifies the time for a block value to match an
input, output, or calculated value or the time for
dissipation of the internal balancing bias.
None The bias value.
None The bias value for IN_1.
None The bias value for IN_2.
None The bias value for IN_3.
Manual
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