Number of records available in OPC Toolbox engine
RecordsAvailable indicates the number of records that are available in the OPC Toolbox™ software engine. When you extract records from the engine with the getdata function, the RecordsAvailable value reduces by the number of records extracted. RecordsAvailable is reset to 0 and the toolbox engine is cleared when you issue a start command.
Use the RecordsAcquired property to find out how many records have been acquired since the start command was issued.
Any integer in the range [0 Inf]. The default value is 0.