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2. 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. [2] Part 3 of IEC 61131 deals with basic software architecture and programming languages of the control program ...

3. Remote terminal unit - Wikipedia

   en.wikipedia.org/wiki/Remote_Terminal_Unit

   A remote terminal unit (RTU) is a microprocessor-controlled electronic device that interfaces objects in the physical world to a distributed control system or SCADA (supervisory control and data acquisition) system by transmitting telemetry data to a master system, and by using messages from the master supervisory system to control connected objects. [1]

4. DNP3 - Wikipedia

   en.wikipedia.org/wiki/DNP3

   The Remote Terminal Unit is initially interrogated with what DNP3 terms an "Integrity Poll" (a combined Read of Class 1, 2, 3 and 0 data). This causes the Remote Terminal Unit to send all buffered events and also all static point data to the Master station. Following this, the Master polls for the event data by reading Class 1, Class 2 or Class 3.

5. SCADA - Wikipedia

   en.wikipedia.org/wiki/SCADA

   RTUs [1] connect to sensors and actuators in the process, and are networked to the supervisory computer system. RTUs have embedded control capabilities and often conform to the IEC 61131-3 standard for programming and support automation via ladder logic, a function block diagram or a variety of other languages.

6. IEC 61131 - Wikipedia

   en.wikipedia.org/wiki/IEC_61131

   Standard IEC 61131 is divided into several parts: [3]. Part 1: General information. It is the introductory chapter; it contains definitions of terms that are used in the subsequent parts of the standard and outlines the main functional properties and characteristics of PLCs.

7. Smart card application protocol data unit - Wikipedia

   en.wikipedia.org/wiki/Smart_card_application...

   0, 1 or 3 Encodes the number (N c) of bytes of command data to follow 0 bytes denotes N c =0 1 byte with a value from 1 to 255 denotes N c with the same length 3 bytes, the first of which must be 0, denotes N c in the range 1 to 65 535 (all three bytes may not be zero) Command data N c: N c bytes of data L e: 0, 1, 2 or 3

8. Template:List of IEC standards - Wikipedia

   en.wikipedia.org/wiki/Template:List_of_IEC_standards

   To change this template's initial visibility, the |state= parameter may be used: {{List of IEC standards | state = collapsed}} will show the template collapsed, i.e. hidden apart from its title bar. {{List of IEC standards | state = expanded}} will show the template expanded, i.e. fully visible.

9. Template:RapidX Infobox station line/doc - Wikipedia

   en.wikipedia.org/wiki/Template:RapidX_Infobox...

   RapidX Infobox station line is a template used in the article infoboxes of stations in the RapidX network. Please refer to Module:Adjacent stations/RapidX To use this template, insert it in the |type= parameter of {{ Infobox station }}.