Rosemount OCX 8800, Instruction Manual

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Instruction Manual
IM-106-880, Rev 2.1
April 2017
OCX 8800
7-53
Index
Number
Parameter Units Description
10 PV_SCALE None The high and low scale values, engineering units code, and number of digits to the
right of the decimal point associated with OUT.
19 RANGE_HI None The high limit for IN.
20 RANGE_LO None The low limit for IN. If IN is less than RANGE_LO, then IN_LO is used.
3 STRATEGY None The strategy field can be used to identify grouping of blocks. This data is not
checked or processed by the block.
1 ST_REV None The revision level of the static data associated with the function block. The revision
value will be incremented each time a static parameter value in the block is
changed.
2 TAG_DESC None The user description of the intended application of the block.
35 UPDATE_EVT None This alert is generated by any changes to the static data.
Figure 7-23. Arithmetric
Function Block Diagram
IN
_LO
OUT
N_1
N_2
N_3
Block Errors
Table 7-30 lists the conditions reported in the BLOCK_ERR parameter.
Table 7-30. BLOCK_ERR
Parameters
0 Other: The output has a quality of uncertain.
1 Block Configuration Error: Select type is not configured
2 Link Configuration Error
3 Simulate Active
4 Local Override
5 Device Fault State Set
6 Device Needs Maintenance Soon
7 Input Failure/Process Variable has Bad Status: One of the inputs is Bad or not
connected.
8 Output Failure
ALGORITHM
LOGIC
GAIN + BIAS
(IN_1 + BIAS_IN-1) * GAIN_IN_1
tempIN_2
(IN_2 + BIAS_IN-1) * GAIN_IN_2
(IN_3 + BIAS_IN-1) * GAIN_IN_3
RANGE LO RANGE HI ARITH_TYPE
BAL_TIME
PV_UNIT
PV
OUT_HI_LIM
OUT_LO_LIM
OUT_LO_LIM
OUT_LO_LIM
tempIN_1
tempIN_3
Condition
Number
Condition Name and Description
3
9
9
3
0
0
1
9