IEC 61131-3 Data Objects

Help Contents


A Data Object is a data structure that is created and accessed using IEC 61131-3 extension functions.

Fernhill SCADA supports these Data Objects:

Object TypeDescription
LinkedList A list of elementary data values. Functions are available to:
  • Create LinkedList Data Objects.
  • Add entries to LinkedList Data Objects.
  • Remove entries to LinkedList Data Objects.
  • Query the contents of LinkedList Data Objects.
SQLCommand Represents an SQL Command on a data source. The SQL Command can be:
  • A query that returns a result set, or
  • A data manipulation language (DML) statement that updates a data source.
TextDocument Represents a text document. The text document can be formatted using:
  • Plain text
  • CSV
  • JSON

Further Information

IEC 61131-3

To learn how IEC 61131-3 is used in Fernhill SCADA.


For the meaning of terms used in Fernhill SCADA.