Allen-Bradley 1444-TSCX02-02RB User Manual page 190

Chapter 4 Measurement Definition
190
Sample Resolution
While the TWF and FFT defined on the FFT Page are limited in size to a
maximum of 8192 TWF Samples and 1800 FFT Lines, far higher resolution
data can be read from the demand buffer. The following table provides the size
selections available from the demand buffer.
FFT Lines
TWF Samples Base FFT Lines
65536 -
32768 12800
16384 6400
8192 3200
4096 1600
2048 800
1024 400
512 200
256 -
(1) The Base FFT Lines can potentially be the selections that are provided by the software application as how the selections are
presented is a function of the application software. However, the actual number of FFT Lines served by the module is dependent
on the decimation and filtering applied as shown.
(2) Or if the measurement type (See
Cross Module Synchronized Measurements
The Demand buffer allows for reading the measurements from multiple
modules that were sampled simultaneously. Besides the raw channel data that is
sampled from the specified signal source location, the buffer also retains each
of the two TTL tachometer signals. As a result, software can request data from
different modules that start at the same tachometer pulse, so long as the
modules share the TTL signal.
Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
(1)
Decimation
None Alternate Path
- -
14400 8000
7200 4000
3600 2000
1800 1000
900 500
450 250
225 125
- -
Hardware Configuration Page) is either of the aeroderivative selections.
(2)
Primary Path
-
4800
2400
1200
600
300
150
75
-