Download DFE32B PROFINET IO

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Communication
model
PROFINET Operating Behavior
Introduction
The communication model of PROFINET IO is based on the many years of experience
with PROFIBUS DP-V1. The master slave access procedure was mapped on a provider-consumer model.
Several communication channels are used for the data exchange between IO controller
and IO devices. The cyclic IO data and the event-driven alarms are transferred via realtime channels. The standard channel based on UDP / IP is used for parameter settings,
configuration and diagnostic information.
Unit model
The known decentralized periphery of PROFIBUS DP was enhanced for the device
model. The device model is based on slot and subslot mechanisms where modular devices with slots can be implemented for modules and submodules. In this way, the slot
and submodules are represented by subslots for the modules. These mechanisms also
enable logical modularization, e.g. for a drive system (→ following figure).
58645AXX
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Manual – DFE32B PROFINET IO Fieldbus Interface