Omron NX Series User Manual page 222

Appendices
data. The Feature Value/Machine Learning Function of the AI Controller executes processing as de-
scribed below.
The Feature Extraction Function of the AI Controller executes processing as follows:
(1) Variable data acquisition
According to the AI machine learning model, the function determines variable data, frame variables,
and subframe variables. The calculation interval of variable data is obtained from the values of frame
variables and frame variables.
(2) Feature value calculation
According to the feature value calculation method that is set to the AI machine learning mode, it calcu-
lates the feature value from the calculation interval of variable data.
The feature value is calculated for each variable data. The calculated feature value is output to the
Time Series Database Function.
The Machine Learning Function of the AI Controller executes processing as follows:
(3) Calculation of equipment event monitoring score
The function calculates the equipment event monitoring score that shows a difference from the normal
value with the AI machine learning model.
The equipment event monitoring score is output to the Time Series Database Function.
(4) Level judgment
Based on the threshold values defined in the AI machine learning model, the equipment event moni-
toring scores are determined to Normal, Alarm level 1, or Alarm level 2.
The equipment event monitoring result is output to the Time Series Database Function.
The following is an example of outputting feature values and equipment event monitoring results from
the two variable data. To simplify the process, this section explained only two feature values, but you
can set up to 16 feature values to each equipment event.
For details on the format of FTR-****.csv and AIS-****.csv files that are saved in the built-in RAM, refer
to A-5 CSV File Format on page A-32.
Make sure to check if equipment events can be detected in this phase. If the events can not be detect-
ed, perform the Data Collection Phase or Data Analysis Phase again.
A-30
NX/NY-series Artificial Intelligence Machine Automation Controller User's Manual (W594)