What are User Defined Function Blocks (UDFB)?

Tags: FAQFeatureIEC

What are User Defined Function Blocks (UDFB)?

Part of the IEC 61131-3 standard, our HMI+PLC (HMC) and PLC (MLC) configuration software MAPware-7000 supports User Defined Function Blocks (UDFB).

User Defined Function Blocks are a way of making the logic in a PLC program re-usable.

The UDFB associates a set of inputs, outputs, and internal data with a logic sequence. Multiple instances of the UDFB can then be created and used throughout a program. Each instance of the UDFB will have its own set of data registers to work with.

By using multiple instances of the same logic sequence, it is possible to make a change throughout a project by changing a single logic sequence in one place. UDFBs can also be used across different projects.

Content Created by David Franzwa
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