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HOW TO READ FUNCTIONAL LOGIC DIAGRAMS

Function block diagram - Wikipedia
Function Block Diagram is one of five languages for logic or control configuration supported by standard IEC 61131-3 for a control system such as a Programmable Logic Controller (PLC) or a Distributed Control System (DCS). The other supported languages are ladder logic, sequential function chart, structured text, and instruction list. See also
Functional flow block diagram - Wikipedia
OverviewHistoryDevelopment of functional flow block diagramsBuilding blocksA functional flow block diagram is a multi-tier, time-sequenced, step-by-step flow diagram of a system’s functional flow. The term "functional" in this context is different from its use in functional programming or in mathematics, where pairing "functional" with "flow" would be ambiguous. Here, "functional flow" pertains to the sequencing of operations, with "flow" arrows expressing dependence on the success of prior operations. FFBDs may also express input and output data dependencies..See more on enpedia · Text under CC-BY-SA license
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 wSee more on plcacademy
Logic Diagrams - Industrial Wiki - odesie by Tech Transfer
The use of logic symbology results in a diagram that allows the user to determine the operation of a given component or system as the various input signals change. To read and interpret logic diagrams, the reader must understand what each of the specialized symbols represent. This chapter discusses the common symbols used on logic diagrams.