P-NET CHANNEL STRUCTURE

P-NET Channel Structure One of the most important aspects of the P-NET fieldbus, is its integrated use of Channels. A Channel is a set of data associated with a particular…

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VIRTUAL TOKEN PASSING

Virtual Token Passing Each P-NET master is given a node address (NA), between 1 and the number of masters expected within a system. All masters contain an 'idle bus bit…

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P-NET ARCHITECTURE

P-NET in Architecture P-NET is specified and implemented according to the Open Systems Interconnection Reference Model, on layers 1, 2, 3, 4, and 7, as shown in the diagram in…

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INTELLIGENT P-NET MODULES

Intelligent P-NET modules Typical P-NET slave modules give the system integrator more than just Input / Output functions. They very often contain additional process oriented functions varying from simple limit…

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MULTI-NET STRUCTURES

Multi-net Structures The previously accepted way of designing a network architecture for a factory, was to have the Fieldbus directly connected to the sensors and actuators. The Fieldbus would then…

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PRINCIPLES OF P-NET

Principles of P-NET The electrical specification of P-NET is based on the RS485 standard using a shielded twisted pair cable. This allows a cable length of up to 1200 m…

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P-NET IN GENERAL

P-NET in General The P-NET Fieldbus is designed to connect distributed process components like process computers, intelligent sensors, actuators, I/O modules, field and central controllers, PLC's etc., via a common…

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