Restrictions - Omron NX Series User Manual

2 Time Series Database Function
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Restrictions

The following restrictions apply to the Time Series Database Function.
• When the AI Controller power was turned off with the TSDB service status set to other than
"Shutdown", the contents of the TimeSeries and CSV files cannot be guaranteed. Make sure to turn
off or reset the AI Controller after you shut down the TSDB service.
• Data is recorded in a ring buffer of the TimeSeries. Data in the TimeSeries may be overwritten ac-
cording to the sampling period and the export period. The storage usage volume of the TimeSeries
can be checked from the AI Operator. Make sure to adjust the export period when you use the Time
Series Database Function.
• In some cases, values of variables in all the periods are not retrieved in an CSV file. You can check
*1
the index field of the CSV file to check if all the data has been retrieved. If all the data was not
retrieved, perform the following:
a) Reduce the volume of variables (size and number of variables) to collect.
b) Increase the task period of the primary periodic task.
c) Decrease the export period.
d) Secure the execution time for the system services.
*1. For details on the index in the CSV file, refer to Appendices on page A-1.
• Since the storage to output files is in the RAM area, files are deleted when you turn OFF the AI Con-
troller power or reset the controller. Before you turn OFF the AI Controller or reset the controller,
make sure to read out the data on the AI Operator or transfer the data with the WebAPI function.
• If you are using an NX-series AI Controller, the 8 GB memory out of the 16 GB SD Memory Card is
used for the AI functions. Therefore, the remaining 8 GB is available for the users. Refer to
A-1-1 Specifications Unique to the AI Controllers on page A-2 for the specifications of an SD
Memory Card.
• The task processing period becomes longer when the TSDB function is activated. After you run the
TSDB function, make sure to perform the system evaluation. Note that Execution Time Estimation
Mode of the Simulator on the Sysmac Studio is not supported.
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NX/NY-series Artificial Intelligence Machine Automation Controller User's Manual (W594)