Status of data logging
Logging is automatically set to 'on' when you issue a start command. Logging is automatically set to 'off' when you issue a stop command, or when the requested number of records is logged. You specify the number of records to log with the RecordsToAcquire property.
When Logging is 'on', each DataChange event (a record) is stored to disk or to memory (the buffer) as defined by the LoggingMode property.