Function Block Diagram (FBD) Programming Tutorial - PLC Standard Function BlocksComparison Function BlocksSelection Function BlocksMake Your Own Function BlocksIn the standard from IEC a lot of function blocks are described. Here’s an overview of the most important blocks in the official FBD description most basic functionality of a PLC program is logic. Combined called combinatorial logic. Logic is the simplest form of algorithm that, via the states of its inputs can set some outputs. Basically, there are two different bit logic functions or operations in FBD. With just these two you can derive a whole bunch of other logic functions let’s s..See more on plcacademyAuthor: Peter Function Blocks in Programmable Logic controllers Tutorial The term function block diagram (FBD) is used for PLC programs described in terms of graphical blocks. It is described as a graphical language for depicting signal and data flows through blocks, which are reusable software elements. A function block is a program instruction unit that, when executed, yields one or more output values.
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