Rockwell Automation 1441-PEN25-Z Enpac 2500 Data Collector - Manual (Page 263)

Rockwell Automation Publication GMSI10-UM002D-EN-E - August 2012 263
Run Up/Coast Down Application Chapter 10
Refer to Displaying the Bode Plot on page 264 .
Table 46 - Bode Plot Parameters
Parameter Name Description Values/Comments
Start Spd (RPM) Sets the start speed of the recorded data for the Bode plot. 10…3600 RPM
This defaults to the Start Spd value set in the RUCD
Setup screen.
See Table 44 on page 258 .
Stop Spd (RPM) Sets the stop speed of the recorded data for the Bode plot. 10…3600 RPM
This defaults to the Start Spd value set in the RUCD
Setup screen.
See Table 44 on page 258 .
Spacing Controls the spacing between collected spectra.
• Delta RPM- A fixed speed change between spectra.
• % Delta RPM- A percentage speed change between spectra.
• Delta Time- A fixed time interval between spectra.
• Delta RPM+Delta Time- A combination of speed and time interval
settings. If speed stops changing then spectra are calculated using
the Time Interval value.
• % Delta RPM+Delta Time- A combination of speed and time
interval settings. If speed stops changing then spectra are
calculated using the Time Interval value.
Options:
Delta RPM
% Delta RPM
Delta Time
Delta RPM+Delta Time
% Delta RPM+Delta Time
Your selection affects the Speed Interval and Time
Interval settings.
Speed Interval (RPM) Sets the speed interval used in calculating FFT spectra. 1…240 RPM or % RPM
This parameter not used when Spacing is set to
`Delta Time.‘
Time Interval (sec) Sets the time interval used in calculating FFT spectra. Enter a value from .001…604800 seconds
This parameter is not used when Spacing is set to
`Delta RPM‘ and `% Delta RPM.‘
Display Units Sets the Y-axis units. The available units depends on the transducer
used to collect data.
See Table 44 on page 258 .
LF Cutoff Determines whether to apply a low frequency filter (0.3 times the
running speed) to the data. Options:
Off
On
Detection Sets the signal detection and scaling display for the Bode plot.
• Peak - Measured RMS value multiplied by the square root of two
(1.4142).
• Pk-Pk - Measured RMS value multiplied by two times the square
root of two (2.8284).
• RMS - Root mean squared signal level of the input signal.
Options:
RMS
Peak
PkPk
Y-axis Sets the y-axis scaling on the Bode plot.
• Linear - The plot grid centers are linearly spaced in Y between the
centers of the first and last grid.
• Log - The plot grid centers are logarithmically spaced in Y between
the centers of the first and last grid.
Options:
Linear
Log