How I Decide What Belongs in a TIA Portal UDT
June 22, 2026 — A practical way to decide what belongs in a TIA Portal UDT after the design starts changing: commands, status, hardware IO, child interfaces, communication data, private state, and structure-change risk.
Data Types and UDTs - The Type System in TIA Portal
June 15, 2026 — Article 7 of the Studying TIA Portal series. Why data types in TIA Portal are part of the engineering contract: elementary types, STRUCT, ARRAY, UDTs, DB fields, FB interfaces, structured PLC tags, and external boundaries such as HMI and OPC UA.
