The LOG file settings are checked by the PLC.
Once data recording becomes executable, the data recording active system variables (sys_bIsLog0DataRecordingActive–sys_bIsLog15DataRecordingActive) turn to TRUE. When the data recording active system variable is TRUE and when the sampling condition is met, data recording starts.
All other flags for LOGn are cleared during the start request operation.
Once writing data into an SD card becomes enabled after the data recording active system variables (sys_bIsLog0DataRecordingActive–sys_bIsLog15DataRecordingActive) have turned to TRUE, the SD card logging active system variables (sys_bIsLog0LoggingToSDCardActive–sys_bIsLog15LoggingToSDCardActive) turn to TRUE.
When the option Save buffer to file on SD card has been selected in the data recording configuration, an operation error occurs if one of the following conditions applies: There is no SD card inserted, the SD card cannot be read or written to, the card cover is open.