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—com:basic_as_i [2025/05/31 22:51] (current) – created - external edit 127.0.0.1
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 +~~NOCACHE~~
 +====== lamaPLC Communication: AS-i ======
 +{{ :com:asi_logo.png?120|lamaPLC Communication: AS-i}}
 +\\
 +//Actuator Sensor Interface// (**AS-Interface** or **AS-i**) is an industrial networking solution (physical layer, data access method, and protocol) used in PLC, DCS, and PC-based automation systems. It is designed for connecting simple field I/O devices (e.g., binary ON/OFF devices such as actuators, sensors, rotary encoders, analog inputs and outputs, push buttons, and valve position sensors) in discrete manufacturing and process applications using a single two-conductor cable.\\
 +\\
 +{{ :com:as_i_1.png?150|AS-i}}
 +AS-Interface is an 'open' technology supported by many automation equipment vendors. The AS-Interface has been an international standard according to IEC 62026-2 since 1999.\\
 +\\
 +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 [[com:basic_profibus|Profibus]], [[com:basic_devicenet|DeviceNet]], [[com:basic_interbus|Interbus]] and [[com:basic_ie|Industrial Ethernet]], for whom it offers a low-cost remote I/O solution. It is used in automation applications, including conveyor control, packaging machines, process control valves, bottling plants, electrical distribution systems, airport baggage carousels, elevators, bottling lines, and food production lines. \\
 +\\
 +AS-Interface provides a basis for Functional Safety in machinery safety/emergency stop applications. Safety devices communicating over AS-Interface follow all the normal AS-Interface data rules. AS-International, a member-funded non-profit organization in Gelnhausen/Germany, manages the AS-Interface specification. Several international subsidiaries exist around the world.\\
 +
 +===== Sources =====
 +Wikipedia ([[https://en.wikipedia.org/wiki/AS-Interface|here]]) \\
 +
 +
 +
 +
 +===== AS-i versions =====
 +
 +^feature^Version 2.0^Version 2.1^Version 3.0|
 +^**number of slaves**|max. 31|max. 62||
 +^**I/O number**|124 I / 124 O|248 I / 186 O|496 I / 496 O|
 +^**signals**|Data and power supply up to a maximum of 8A (value dependent on power supply unit).|||
 +^maximum current consumption|65 mA / participant|||
 +^**wire**|unshielded, untwisted, special 2 x 1.2 mm² wire (more under [[#wires|wires]])|||
 +^request time per slave|150µs|||
 +^**maximum cycle time**|5 ms\\ |10 ms (with extended addressing, otherwise 5 ms)||
 +^**analog value transfer**|through a function block|operation integrated into the master||
 +^**number of analog values**|16 bytes of digital and analog values|124 analog values||
 +^data transfer rate|167 kBit / s, net 53.3 kBit/s (with pauses)|||
 +^topology|optional, typically ring, tree, chain or bus.|||
 +^**type of connection**|master / slave (monomaster)|||
 +^**wire length**|100 m per segment, can be extended to a maximum of 300 meters with a maximum of 2 repeater (there can still only be one master in the entire network).||100 m per segment, maximum 600 m. |
 +^addressing|with addressing unit or automatic|||
 +^coding||Manchester-II / APM|||
 +
 +{{ :com:as_i_siemens.png |AS-i Siemens}}
 +
 +===== Sources =====
 +Wikipedia ([[https://en.wikipedia.org/wiki/AS-Interface|here]]) \\
 +
 +===== AS-i topics on lamaPLC =====
 +{{topic>AS-i}}
 +
 +
 +{{tag>bus communication as-i basic industrial_ethernet deviceNet Interbus Manchester-II APM}}
 +\\
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