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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. 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 ...

4. Sequential function chart - Wikipedia

   en.wikipedia.org/wiki/Sequential_function_chart

   Sequential function chart (SFC) is a visual programming language used for programmable logic controllers (PLCs). It is one of the five languages defined by IEC 61131-3 standard. The SFC standard is defined as Preparation of function charts for control systems, and was based on GRAFCET (itself based on binary Petri nets [1] [2]).

5. 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.

6. Instruction list - Wikipedia

   en.wikipedia.org/wiki/Instruction_list

   Instruction list (IL) is one of the 5 languages supported by the initial versions of IEC 61131-3 standard, and subsequently deprecated in the third edition. [1] It is designed for programmable logic controllers (PLCs). It is a low level language and resembles assembly. All of the languages share IEC61131 Common Elements. The variables and ...

7. 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.

8. 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 ...

9. 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.