ProSoft Technology MVI56-AFC - Manual (Page 185)

MVI56-AFC ♦ ControlLogix Platform MVI56-AFC Backplane Communication
Liquid and Gas Flow Computer User Manual
ProSoft Technology, Inc. Page 185 of 316
February 25, 2011
Description
This block supplies the analysis for AGA8 and GPA8173 calculations, in low-
precision form as integers scaled to 4 decimal places. Upon change of analysis
the meter undergoes a "characterization" calculation, which is performed before
this block is returned; if the analysis has not changed, no characterization is
required, and this block is returned immediately.
Element Attribute Element Attribute
0 Block ID - Function Code & Meter Number 0 Block ID - Function Code, Meter Number,
Active Stream Number
1 Propane - C1 Reserved
2 Nitrogen - N2 Reserved
3 Carbon dioxide -CO2 Reserved
4 Methane - C2 Reserved
5 Propane - C3 Reserved
6 Water - H2O Reserved
7 Hydrogen Sulfide - H2S Reserved
8 Hydrogen - H2 Reserved
9 Carbon Monoxide - CO Reserved
10 Oxygen - O2 Reserved
11 Iso Butane - IC4 Reserved
12 Butane - C4 Reserved
13 Iso Pentane - IC5 Reserved
14 Pentane - C5 Reserved
15 Hexane - C6 Reserved
16 Heptane - C7 Reserved
17 Octane - C8 Reserved
18 Nonane - C9 Reserved
19 Decane - C10 Reserved
20 Helium - He Reserved
21 Argon - Ar Reserved
22 Neo Pentane - C5 Reserved
23 Ux User 1 Reserved
24 Ux User 2 Reserved
The input block always returns an alarm indicator as part of the block id; the
remaining 24 words are freely selectable from the entire meter database, with the
default selection being nothing (all zero).
An application should not implement both 16-bit and 32-bit analysis blocks for the
same stream. The AFC will convert the analysis, whether 16-bit or 32-bit, to the
precision configured for the analysis slot assigned to the targeted stream, though
best practice would be to use the analysis block that matches the configured
precision.