Fundamental properties
Programmable logic controllers
Article REF: S8015 V2
Fundamental properties
Programmable logic controllers

Author : Michel BERTRAND

Publication date: December 10, 2010 | Lire en français

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2. Fundamental properties

The best way to concretize the definition of an API is to examine the hardware and software elements it must comprise, and how they fit together to form an operational whole.

2.1 Constituents

Regardless of whether the – controller is compact (monobloc), modular (i.e. made up of functional modules in boxes that can be plugged into a specific chassis, or as boards to be mounted in standard racks (19" rack) – it includes the elements detailed below.

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2.1.1 Central unit

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