Function Blocks are an essential programming tool in PLC programming. This method of programming allows the user to visual tie blocks of code together and utilize functions which aren’t available otherwise. Furthermore, certain PLC based logic components are much easier to implement and visualize in function blocks instead of ladder logic or structured text.
This is a companion discussion topic for the original entry at https://www.solisplc.com/tutorials/plc-function-block-programming-for-analog-input-scaling-fbd-tutorial-in-rslogix-5000