Function/function blocks are blocks that store their inputs/outputs in local labels for processing. They help reduce the time spent programming systematic processes/sequences as an instance can always be created. Instances are the results gotten by calling a function block. Programming function block in Mitsubishi is straightforward and gives the programmer flexibility in usage. This tutorial introduces the basics of function blocks and troubleshooting methods.
This is a companion discussion topic for the original entry at https://www.solisplc.com/tutorials/mitsubishi-gx-works2-function-block-programming-and-troubleshooting