Description
1.3 What is PROFINET IO?
ET 200pro distributed I/O system
20 Operating Instructions, 03/2013, A5E00335544-08
What is PROFINET IO?
Definition
PROFINET IO is an open transmission system with real-time functionality defined in
accordance with the PROFINET standard. This standard defines a manufacturer-
independent communication, automation and engineering model.
Accessories for wiring the PROFINET components are available in industrial quality.
● PROFINET does not deploy the hierarchical PROFIBUS master/slave principle. A
provider/consumer principle is used instead. The planning process specifies which
modules of an IO device an IO controller subscribes to.
● The quantities are extended in accordance with the options offered by the PROFINET IO.
Parameter limits are not exceeded during configuration.
● The transmission rate is 100 Mbps.
● The user's configuration interface is generally the same as that on PROFIBUS DP
(configuration in STEP 7 > HW CONFIG).
Structure of a PROFINET IO network
The figure below illustrates the typical layout of a PROFINET IO network. Existing
PROFIBUS slaves can be integrated by an IE/PB link.
Figure 1-2 Structure of a PROFINET IO network
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