[Problem] The history data of S240 cannot be queried
[Problem] The history data of S240 cannot be queried. [Solutions] (1) Confirm equipment calibration time is the local accurate time; (2) Set the storage interval of the historical data of the device (default is not saved); (3) Run the device for more than 24 hours, open the history page on the configuration software, select the starting time and number of bars, and click Read.
