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Data Logs and Buffers

Log data to disk or memory, read data logs

Functions

`refresh`	Read all active items in group
`start`	Start a logging task
`stop`	Stop a logging task
`wait`	Suspend MATLAB execution until object stops logging
`flushdata`	Remove all logged data records associated with dagroup object
`getdata`	Retrieve logged records from OPC Toolbox engine to MATLAB workspace
`peekdata`	Preview most recently acquired data
`opcread`	Read logged records from disk to MATLAB workspace
`opcstruct2array`	Convert OPC data from structure to array format
`opcstruct2timeseries`	Convert OPC data from structure to time series format

Properties

`Active`	Group or item activation state
`DeadbandPercent`	Percentage change in item value that causes subscription callback
`LogFileName`	Name of disk file to which logged data is written
`Logging`	Status of data logging
`LoggingMode`	Specify destination for logged data
`LogToDiskMode`	Method of disk file handling for logged data
`RecordsAcquired`	Number of records acquired
`RecordsAvailable`	Number of records available in OPC Toolbox engine
`RecordsToAcquire`	Number of records to acquire for logging session
`Subscription`	Enable server update when data changes
`UpdateRate`	Rate, in seconds, at which subscription callbacks occur