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Operate the Module
Chapter 10
Configuring Low-Frequency Measurements
Due to various signal-processing complexities, such as integration and filtering
near to DC, Low Frequency is considered as measurements at frequencies less
than about 10 Hz.
Figure 95 - Integrating Acceleration to Velocity
While the problems of integrating low frequency signals are readily apparent,
less so are issues associated with common overall measurements.
For the overall measurements, these tables illustrate the performance of the
post-filter and mid-filter overall measurements, with its time constant attribute
set to its default and near to and at its high limit values. There are slight
differences in the Overall Algorithm that are applied to the Post-Filter OA that
become apparent at low frequency.
Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
297
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