ABB PFEA113-20 3BSE028144R0020 tension controller
Technical data of product parameters
Once a trend window is opened, additional variables may be added to the trend using the
drag-and-drop operation from logic diagrams and a right-click from operator screens. If PFEA113-20 3BSE028144R0020
the point has been configured as a historical collection point, the trend backfills with data
from the historical data file.
If there are more traces than can be conveniently viewed, individual traces may be
hidden. Data is still collected, but the traces are not displayed in the Graph View. Multiple
traces can be displayed in a single graph or displayed individually with stacked graphs
and a common time axis for analysis. Grid lines and data point markers on the x-axis can PFEA113-20 3BSE028144R0020
be super-imposed on graphs to assist readability, including unique marker colors for alarm
and event types. For data sets that are frequently trended, user-configurable files may be
created and stored to provide pre-configured, on-demand trends.
The system can automatically collect groups of variables directly from controllers using
the Dynamic Data Recorder (DDR). The user defines an event and time deadband to
capture data with up to 96 variables per DDR. Data is captured at the controller’s frame
rate, with up to 12 DDR data sets per controller.
Trip Logs
Trip logs are defined as part of GE’s standards for each machine controlled. When a trip
occurs (the event), values of key control parameters are captured before and after the trip
for evaluation. Data collected near the trip event is sampled at frame rate since these PFEA113-20 3BSE028144R0020
values are of greatest interest. Data collected earlier is sampled at progressively longer
intervals.
Statistical Calculations
Trender can calculate a set of basic one-variable descriptive statistics for collected data
while in the Replay mode. These statistics are calculated from data displayed between
two cursors, and include average, standard deviation, RMS, minimum, maximum, and
difference (calculated as final–initial). The calculated values are displayed as columns on
the Traces tab when enabled.
Spectral Analysis
Diagnosis of complex problems
on rotating machinery requires
advanced trending tools.
Spectral analysis quickly isolates the most common frequencies of data fluctuations by
changing time-domain data into frequency-domain data, also referred to as a Fast Fourier
Transform (FFT). The FFT tool features include:
Product picture display
About us
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Introduction to main products
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reminder
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