Source

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The term "Source" refers to the source of the data for processing. In the current version, the data source is from an address in the Modbus / TCP protocol. The screen displayed allows you to set the parameters of the protocol and the addresses from which the data comes.
The first six addresses are the date and time of each record. It is the customer's responsibility to define the appropriate data placement for each record in the data source.
The other variables are addresses of registers for reading values in a Double structure.

Source
Source