DOCA0272EN-00

Function Block Library

The TeSys™ island IEC 61131-3 function block library for the TIA Portal provides function blocks that interact with the TeSys™ island through the bus system interface of Siemens SIMATIC PLCs for PROFINET IO and PROFIBUS DP. To access the data, both cyclic and acyclic communication is used, depending on the way the data is provided by the island. The function blocks themselves only act as a proxy forwarding information between the PLC program and the TeSys™ island without changing it. The implementation of the control logic for the avatars resides entirely within the island itself.

The following sections give an overview of what is required to use the function blocks in the TIA Portal, which data types are being used by the function blocks, which types of function blocks exist and how access to the data of the TeSys™ island from the PLC program.

In general, the function block interface and functionality for both PROFINET IO and PROFIBUS DP is identical. The implementation of the function blocks varies slightly due to the different inner mechanics of PROFIBUS DP.

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