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  2. Programmable logic controller - Wikipedia

    en.wikipedia.org/wiki/Programmable_logic_controller

    Compact PLC with 8 inputs and 4 outputs Modular PLC with EtherNet/IP module, discrete and analog I/O, with some slots being empty There are four types of mechanical design for PLC systems. A single box (also called a brick ) is a small programmable controller that fits all units and interfaces into one compact casing, although, typically ...

  3. AS-Interface - Wikipedia

    en.wikipedia.org/wiki/AS-interface

    AS-Interface is a networking alternative to the hard wiring of field devices. It can be used as a partner network for higher level fieldbus networks such as Profibus, DeviceNet, Interbus and Industrial Ethernet, for whom it offers a low-cost remote I/O solution. It is used in automation applications, including conveyor control, packaging ...

  4. IEC 61131-3 - Wikipedia

    en.wikipedia.org/wiki/IEC_61131-3

    IEC 61131-3 is the third part (of 10) of the international standard IEC 61131 for programmable logic controllers.It was first published in December 1993 [1] by the IEC; the current (third) edition was published in February 2013.

  5. Ladder logic - Wikipedia

    en.wikipedia.org/wiki/Ladder_logic

    Ladder diagrams were once the only way to record programmable controller programs, but today, other forms are standardized in IEC 61131-3. For example, instead of the graphical ladder logic form, there is a language called Structured text , which is similar to C, within the IEC 61131-3 standard.

  6. Function block diagram - Wikipedia

    en.wikipedia.org/wiki/Function_block_diagram

    Simple function block diagram. The function block diagram (FBD) is a graphical language for programmable logic controller design, [1] that can describe the function between input variables and output variables. A function is described as a set of elementary blocks. Input and output variables are connected to blocks by connection lines.

  7. Fieldbus - Wikipedia

    en.wikipedia.org/wiki/Fieldbus

    In 1987 Phoenix Contact developed a serial bus to connect spacially distributed inputs and outputs to a centralized controller. [12] The controller send one frame over a physical ring, which contains all input and output data. The cable has 5 wires: beside the ground signal two wires for the outgoing frame and two wires for the returning frame.

  8. Relay logic - Wikipedia

    en.wikipedia.org/wiki/Relay_logic

    The schematic diagrams for relay logic circuits are often called line diagrams, because the inputs and outputs are essentially drawn in a series of lines. A relay logic circuit is an electrical network consisting of lines, or rungs, in which each line or rung must have continuity to enable the output device.

  9. Programmable logic array - Wikipedia

    en.wikipedia.org/wiki/Programmable_logic_array

    Programmable logic arrays should correspond to a state diagram for the system. The earliest Commodore 64 home computers released in 1982 (into early 1983) initially used a programmed Signetics 82S100 PLA, but as the demand increased, MOS Technology / Commodore Semiconductor Group began producing a mask-programmed PLA, which bore part number ...

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