Data Types

In general, the TeSys™ island function block library for the TIA Portal at the function block interfaces uses the standard simple data types (as defined by IEC 61131-3) provided by the Siemens TIA Portal. The individual data types have been chosen to best match the representation and bit-size of the data on the TeSys™ island. Timestamps are represented using the complex data type “DTL” of the Siemens TIA Portal.

For parametrization of the data exchange, the two special data types “Variant” (cyclic input data) and “HW_IO” (acyclic data) are used as function block inputs where appropriate (see also Data Access).

For additional information on the usage, data ranges, bit-sizes, and conversion functions for the Siemens TIA Portal data types, refer to the Siemens TIA Portal Information System.

For some purposes, the function blocks use User Defined Types (UDTs) in the Siemens TIA Portal. See UDTs.