Rockwell Automation 1441-DYN25-MRUC Run Up Coast Down Extension Module for the Dynamix 2500 - Manual (Page 26)

26 Rockwell Automation Publication 1441-UM006A-EN-P - May 2011
Chapter 2 Run Up/Coast Down Extension Module
See Display the Nyquist Plot on page 27 .
Table 5 - Nyquist Plot Parameters
Parameter Name Description Values/Comments
Start Spd (RPM) Sets the start speed of the recorded data for the plot.
This defaults to the Start Spd value set in the RUCD Setup screen.
See Run Up/Coast Down Setup Parameters on page 18 .
10…3600 rpm
Stop Spd (RPM) Sets the stop speed of the recorded data for the plot.
This defaults to the Stop Spd value set in the RUCD Setup screen.
See Run Up/Coast Down Setup Parameters on page 18 .
10…3600 rpm
Spacing Controls the spacing between collected spectra:
• Δ rpm is a fixed speed change between spectra.
• % Δ rpm is a percentage speed change between spectra.
• Δ Time is a fixed time interval between spectra.
• Δ rpm + Δ Time is a combination of speed and time interval
settings. If speed stops changing then spectra are calculated using
the Time Interval value.
• % Δ rpm + Δ Time is a combination of speed and time interval
settings. If speed stops changing then spectra are calculated using
the Time Interval value.
Δ rpm
% Δ rpm
Δ Time
Δ rpm + Δ Time
% Δ rpm + Δ Time
Your selection affects the Speed Interval
and Time Interval settings.
Speed Interval (RPM) Sets the speed interval used in calculating FFT spectra.
This parameter not used when Spacing is set to Δ Time.
1… 240 rpm or % rpm
Time Interval (sec) Sets the time interval used in calculating FFT spectra.
This parameter is not used when Spacing is set to Δ RPM and % Δ RPM.
.001…604800 s
Display Units Sets the Y-axis units.
The available units depends on the transducer used to collect data.
See Run Up/Coast Down Setup Parameters on page 18 .
LF Cutoff Determines whether to apply a low frequency filter (0.3 times the running
speed) to the data. Off
On
Detection Sets the signal detection and scaling display for the 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.
RMS
Peak
PkPk
Num Traces Sets the number of traces or order tracks to be displayed on the plot.
Your selection determines the available number of Trace Order
parameters.
1
2
3
4
Trace Order #1-#4 The order numbers to be tracked and displayed on the plot.
This value cannot exceed the Max No Orders value set in the RUCD Setup
screen.
See Run Up/Coast Down Setup Parameters on page 18 .
.001…166 orders