Automated data transfer between automation systems and the cloud

A method, comprising:

• establishing, by a system comprising a processor, a connection to an industrial data source, wherein the industrial data source stores current values of respective data tags that are written to and read from by the industrial data source in a data table;
• identifying, by the system based on an examination of an event log generated by and stored on the industrial data source, a subset of the data tags having values that have changed in excess of a defined threshold since a previous examination of the event log, wherein the event log comprises a chronological sequence of time-stamped event records that record software or hardware events initiated by or detected by the industrial data source and is stored separately from the data table;
• and
• in response to the identifying, querying, by the system via the connection, the data table for values of the subset of the data tags.

A non-transitory computer-readable medium having stored thereon instructions that, in response to execution, cause a system comprising a processor to perform operations, the operations comprising:

• establishing a communication channel to an industrial data source, wherein the industrial data source maintains a data table that stores current values of data registers that are written to and read from by the industrial data source;
• examining, via the communication channel, an event log generated by and stored on the industrial data source, wherein the event log comprises a chronological sequence of time-stamped event records that record software or hardware events initiated by or detected by the industrial data source and is stored separately from the data table;
• identifying, based the examining, a subset of the data registers whose values have changed in excess of a threshold since a previous examining of the event log;
• and
• in response to the identifying, querying, via the communication channel, the data table for values of the subset of the data registers.