Description
2.1 Introduction to PROFINET
PROFINET with STEP 7
Function Manual, 05/2021, A5E03444486-AL
21
PROFINET IO devices
The following graphic shows the general names used for the most important devices in
PROFINET. In the table below the graphic you can find the names of the individual
components in the PROFINET IO context.
Num-
ber
PROFINET
Explanation
①
PROFINET IO System
②
IO controller
Device used to address the connected IO devices.
This means that: The IO controller exchanges input and output
signals with field devices.
③
Programming device / PC
(PROFINET IO supervisor)
PG/PC/HMI device used for commissioning and for diagnostics
④
PROFINET/Industrial Ethern
et
Network infrastructure
⑤
HMI (Human Machine In-
terface)
Device for operating and monitoring functions.
⑥
IO device
A distributed field device that is assigned to one of the IO con-
trollers (e.g., Distributed IO, valve terminals, frequency con-
verters, switches with integrated PROFINET IO functionality)
⑦
I-device
Intelligent IO device
Figure 2-2
PROFINET devices
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