Emerson Rosemount OCX8800A Manual page 195

Manual
00809-0500-4880
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
36 BLOCK_ALM
6 BLOCK_ERR
27 COMP_HI_LIM
Rosemount OCX8800A
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.
None This block alarm is used for all
configuration, hardware, connection
failure, or system problems in the block.
The cause of the alert is entered in the
subcode field. The first alert to become
active will set the Active status in the
Status parameter. As soon as the
Unreported status is cleared by the alert
reporting task, another block alert may be
reported without clearing the Active
status, if the subcode has changed.
None The summary of active error conditions
associated with the block. The possible
block errors are
error
override
variable has Bad status
failure
service
reports none or a subset of these error
conditions.
EU of PV Determines the high limit of the
compensation input.
F
OUNDATION
December 2022
Block configuration
, ,
Simulate active Local
,
Input failure/process
, ,
Readback failed
, and . Each function block
Other
Fieldbus
™
,
Output
Out of
195