Rockwell Automation 1440-DYN02-01RJ XM Dynamic Measurement Module - Manuel (Page 73)

Publication ICM-UM002F-EN-E - March 2013 73
Configure XM Module in RSLogix 5000 Software Chapter 3
Number of Spectrum Lines Choose the number of lines (bins) in the spectrum
measurement.
• 100
• 200
• 400
• 800
This determines the frequency resolution of
the spectrum measurement.
Note: When Sampling Mode is synchronous,
the Number of Spectrum Lines must be evenly
divisible by the Frequency Maximum value (no
remainder).
Period Displays the total period of the waveform
measurement in seconds.
Samples are accumulated into a time waveform of this
duration before an FFT is performed on the collected
data. Period is provided to show the effect various
settings, such as Number of Spectrum Lines, have on
the update rate of measurements (Band and Vector)
derived from the spectrum.
The value is in seconds when Sampling Mode
is set to asynchronous. The value is in cycles
when Sampling Mode is set to synchronous.
Order of Sum Harmonics Choose the starting order for the sum harmonics
measurement.
• 1
• 2
• 3
• 4
• 5
The amplitudes of all harmonics from the
specified harmonic through the Frequency
Maximum are included in the sum.
Note: The sum harmonics measurement
requires the tachometer to be enabled (Pulses
Per Revolution is set to 1 or more), and a
tachometer signal must be present.
In this field Values are Comments