With any controller or computing device, being able to define a function once and reuse the function over and over is a great way to make your program more efficient and robust.
In Siemens TIA Portal, an FB, or Function Block, is used to define a function, or set of instructions, which can be executed on command from an organization block, or OB. The function block is executed each time it is called from an OB.
In this video, we will learn;
– What an FB is, and
– How an FB executes inside the PLC.