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Function Blocks
AGA8GS Function Block
Revision 11
HC900 Hybrid Control Designer Function Block Reference Guide
23
2/07
Outputs
RHOTP
= Density at flow temperature and pressure conditions in units selected by the UNITS
configuration
parameter.
RHOB
= Density at base conditions in units selected by the UNITS configuration parameter.
RHOS
= Density at standard conditions in units selected by the UNITS configuration parameter.
FPVS
= Super-compressibility factor
GRS
= Real Gas relative density at 60 deg F/14.73 PSI
GRS
=
(M
gas
*Z
air
)/(M
air
*Z
gas
)
where
Z
air
= .9995844 and M
air
= 28.96256
HV
= Heating Value in units selected by the UNITS configuration parameter.
ERR
= Set when calculation status is indicating an error condition. Errors indicate a fatal condition. The
output values in this case will be set to 0 and the error pin turned on until configuration is corrected or
operating conditions return to normal.
WARN
= Set when calculation status is indicating a warning condition - Warnings indicate that the
configured or running conditions are outside of the tolerance for the AGA calculations being performed.
Values will still be calculated but should be viewed as out of tolerance
STATUS
= a status number is placed on this pin which can be used to find the error in the error/warning
lookup table. (See
H
Table 5 AGA Error Codes) This enables the user to connect the pin to comparator
blocks to distinguish various error/warning conditions in the function block configuration.
METER BLK CONNECT
= Must be connected to the companion meter block. This output connection
provides multiple data for input to its associated meter function block, (AGA 3, 7, or 9), reducing the need
to make multiple connections to complete the configuration.
Execution Order of this block must be set to be less than meter block (AGA3, 7, or 9) Execution Order
for correct calculation sequence.
Configuration parameters
The AGA8GS properties dialog box is divided into two tab cards
GENERAL
AGA8
-
Gross
Click on the tab to access the properties for that tab.
Содержание HC900
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