Rockwell Automation 1440-DYN02-01RJ XM Dynamic Measurement Module - Manuel (Page 77)

Publication ICM-UM002F-EN-E - March 2013 77
Configure XM Module in RSLogix 5000 Software Chapter 3
4. When finished, click one of these as needed.
• OK - Click to accept your edits and close the dialog box.
• Cancel - Click to close the dialog box without accepting your edits.
• Apply - Click to accept and apply your edits on any dialog and
continue editing.
IMPORTANT
For bands specified in Hz on an orders-based spectrum
(Sampling Mode set to Synchronous with tach), the band
measurement value will be zero when the Band Frequency
Minimum and Frequency Maximum fall completely beyond the
frequencies represented in the spectrum. If any of the band
falls within the spectrum, only that portion will contribute to
the band value.
Example
Band Frequency Maximum = 250 Hz
Band Frequency Minimum = 150 Hz
Spectrum Frequency Maximum = 10 Orders
The following table shows the actual Band Frequency
Maximum and Minimum values given different operating
speeds for this example. Note that when the speed is 600 RPM,
the Band Frequency Maximum and Minimum values fall outside
the range of the Spectrum Frequency Maximum, so that the
band value will be zero. When the speed is 1200 RPM, the band
will be calculated from 150…200 Hz.
Speed
(RPM)
Max Frequency Represented
in Spectrum (Hz)
Band Min
(Hz)
Band Max
(Hz)
2400 400 150 250
1800 300 150 250
1200 200 150 200
600 100 n/a n/a