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2. IEC 61131-3 - Wikipedia

   en.wikipedia.org/wiki/IEC_61131-3

   Part 3 of IEC 61131 deals with basic software architecture and programming languages of the control program within PLC. It defines three graphical and two textual programming language standards: Ladder diagram (LD), graphical; Function block diagram (FBD), graphical; Structured text (ST), textual

3. Programmable logic controller - Wikipedia

   en.wikipedia.org/wiki/Programmable_logic_controller

   A programmable logic controller (PLC) or programmable controller is an industrial computer that has been ruggedized and adapted for the control of manufacturing processes, such as assembly lines, machines, robotic devices, or any activity that requires high reliability, ease of programming, and process fault diagnosis.

4. CODESYS - Wikipedia

   en.wikipedia.org/wiki/CODESYS

   The five programming languages for application programming defined in the IEC 61131-3 are available in the CODESYS development environment. IL (instruction list) is an assembler-like programming language. The IEC 61131-3 user organization PLCopen has declared this language as “deprecated”, which means it shall not be used for new projects ...

5. Ladder logic - Wikipedia

   en.wikipedia.org/wiki/Ladder_logic

   Ladder logic has evolved into a programming language that represents a program by a graphical diagram based on the circuit diagrams of relay logic hardware. Ladder logic is used to develop software for programmable logic controllers (PLCs) used in industrial control applications.

6. SCADA - Wikipedia

   en.wikipedia.org/wiki/SCADA

   They employ standardized control programming languages (such as those under IEC 61131-3, a suite of five programming languages including function block, ladder, structured text, sequence function charts and instruction list), that are frequently used to create programs which run on these RTUs and PLCs.

7. Structured text - Wikipedia

   en.wikipedia.org/wiki/Structured_text

   Structured text, abbreviated as ST or STX, is one of the five languages supported by the IEC 61131-3 standard, designed for programmable logic controllers (PLCs). [1] [2] It is a high level language that is block structured and syntactically resembles Pascal, on which it is based. [3] All of the languages share IEC61131 Common Elements. The ...

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9. Programmable logic device - Wikipedia

   en.wikipedia.org/wiki/Programmable_logic_device

   The languages used as source code for logic compilers are called hardware description languages, or HDLs. [1] PALASM, ABEL and CUPL are frequently used for low-complexity devices, while Verilog and VHDL are popular higher-level description languages for more complex devices. The more limited ABEL is often used for historical reasons, but for ...