ProSoft Technology PTQ-AFC - Manual (Page 77)

PTQ-AFC ♦ Modicon Quantum Platform Quick Start
Liquid and Gas Flow Computer for Hydrocarbon Products User Manual
ProSoft Technology, Inc. Page 77 of 259
June 23, 2011
Process Input Scaling
The module allows you to either pre-scale the process inputs via ladder logic for
use in the measurement calculations, or provide unscaled values from the analog
input modules directly. In the second case, the scaling is done internally. You can
directly enter the zero-scale, the full-scale, and the default values for each of the
process variable inputs through the configuration window.
Scaled Integer
Variable Format Example
Temperature Two decimal places implied A value of 1342 would be equivalent
to 13.42°C
Pressure
No decimal places implied for SI
units (kPa) and one decimal
place implied for U.S. units (psi). A value of 200 would be equivalent to
200kPag
Differential Pressure Two decimal places implied for
inches of H2O and 3 places for
kPa A value of 35142 would be equivalent
to 35.142kPa
Density (kg/m3) One implied decimal place A value of 5137 would be equivalent
to 513.7 kg/m3
Density (Relative Density) Four implied decimal places A value of 10023 would be equivalent
to 1.0023 60F/60F.
Density (API) Two implied decimal places A value of 8045 would be equivalent
to 80.45
API.
In the Meter Monitor window, the raw value is shown at the "Last Raw" column
and the converted values are shown at the "Scaled Avg" column.
When selecting the 4 to 20mA process input scaling, the module uses the
following ranges:
4 to 20mA
Processor Module 0% 100%
SLC MVI46-AFC 3277 16384
ControlLogix MVI56-AFC 13107 65535
CompactLogix MVI69-AFC 6241 31206
PLC MVI71-AFC 819 4095
Quantum PTQ-AFC 4000 20000
The module uses the configured values for zero and full scale to interpret the
process input scaling.