overview
This chapter explains the "logging function", one of the four major functions of Summary Action.
The logging function is a function for saving data collected from PLCs as historical data in CSV files or ODBC databases. The logging function of summary actions can save logs at a maximum interval of one second (if you want to log in millisecond intervals, use "Logger Action"). When using summary actions, the information of the tags to be logged is defined in a configuration file called the "tag field master". The tag field master can be edited using Excel etc.
Furthermore, even if a large number of tags are targeted for logging, the save destination will be automatically divided and distributed according to the number of columns set in the Summary Master (divided by file for CSV, by table for database). Also, by using an index file, you can freely add, insert, and delete tags in the Tag Field Master even if you want to add or delete tags after operation.
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The Summary Action's aggregation, report, and Historical data server functions process historical data saved by the Summary Action's logging function. Historical data generated by other functions, such as the Logger Action, cannot be linked to Summary Actions. |
