X90 mobile modules
X90 mobile system User's manual V 1.20 - Translation of the original manual
193
5.4.1.5.10.4 Configuration
Each of the 32 frequency bands can be configured to one of the following characteristic values.
Characteristic value
Description
FrequencyBandRmsAccEnvelope
The RMS value formed from the envelope signal of the oscillation acceleration in a freely selectable frequency range.
FrequencyBandRmsVelEnvelope
The RMS value formed from the envelope signal of the oscillation acceleration in a freely selectable frequency range.
This frequency band is only calculated if the EnableVelocityCalculation bit (configuration in register
"SensorConfig" on
page 158
) is set for the respective channel; otherwise, 0 is output.
FrequencyBandRmsAccRaw
The RMS value formed from the raw signal of the oscillation acceleration in a freely selectable frequency range.
FrequencyBandRmsVelRaw
The RMS value formed from the raw signal of the oscillation velocity in a freely selectable frequency range.
FrequencyBandNoiseAccEnvelope
The noise value formed from the raw signal of the oscillation acceleration in a freely selectable frequency range.
FrequencyBandNoiseVelEnvelope
The noise value formed from the raw signal of the oscillation acceleration in a freely selectable frequency range. This
frequency band is only calculated if the EnableVelocityCalculation bit (configuration in register
"SensorConfig" on page
158
) is set for the respective channel; otherwise, 0 is output.
FrequencyBandNoiseAccRaw
The noise value formed from the raw signal of the oscillation acceleration in a freely selectable frequency range.
FrequencyBandNoiseVelRaw
The noise value formed from the raw signal of the oscillation acceleration in a freely selectable frequency range. This
frequency band is only calculated if the EnableVelocityCalculation bit (configuration in register
"SensorConfig" on page
158
) is set for the respective channel; otherwise, 0 is output.
Calculating the total width of the frequency band
The measured damage frequency may vary slightly from the expected frequency. It must therefore be ensured that
the frequency band is wide enough to monitor the harmful frequency to compensate for this deviation.
The maximum permissible deviation has been defined as 1/2% of the maximum drive frequency. Since the deviation
could occur in either the positive or negative direction, it must be counted twice. This results in the following formula:
Total range of frequency band = 2 * 1/2% * max. drive frequency [Hz]
Depending on the MaxFrequency selected, a least 3 lines should be configured within each frequency band.
The first lines to the left and right of the configured frequency band are included proportionally based on their
distance from the frequency band (see figure in
"Frequency bands" on page 189
).
Example
At a maximum drive frequency of 50 Hz, a frequency band should be set at 10 Hz.
10 Hz ± (0.005 * 50 Hz) = At least 9.75 Hz lower and 10.25 Hz upper frequency band limits
5.4.1.5.10.5 FrequencyBandMax
Name:
FrequencyBandMax01 to FrequencyBandMax32
Maximum value of the respective frequency band in 1/1000 mm/s or g depending on the configuration. See also
"Characteristic values (minimum and maximum)" on page 179
and "
"Frequency bands" on page 155
" for additional
information.
If the frequency band is configured to a velocity signal, this value is only calculated if bit EnableVelocityCalculation
(configuration in register
"SensorConfig" on page 158
) of the corresponding channel is set; otherwise, 0 is output.
Data type
Values
UDINT
0 to 4,294,967,295
5.4.1.5.10.6 FrequencyBandMin
Name:
FrequencyBandMin01 to FrequencyBandMin32
Minimum value of the respective frequency band in 1/1000 mm/s or g depending on the configuration. See also
"Characteristic values (minimum and maximum)" on page 179
and "
"Frequency bands" on page 155
" for additional
information.
If the frequency band is configured to a velocity signal, this value is only calculated if bit EnableVelocityCalculation
(configuration in register
"SensorConfig" on page 158
) of the corresponding channel is set; otherwise, 0 is output.
Data type
Values
UDINT
0 to 4,294,967,295
