Siemens SIMATIC ET 200AL System Manual page 967

Description
2.1 Introduction to PROFINET
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.
Number PROFINET
①
②
③
④
⑤
⑥
⑦
Figure 2-2
20
PROFINET IO System
IO controller
Programming device / PC
(PROFINET IO supervisor)
PROFINET/Industrial Ethernet
HMI (Human Machine Interface)
IO device
I-device
PROFINET devices
Explanation
Device used to address the connected IO devices.
This means that: The IO controller exchanges input and
output signals with field devices.
PG/PC/HMI device used for commissioning and for di-
agnostics
Network infrastructure
Device for operating and monitoring functions.
A distributed field device that is assigned to one of the
IO controllers (e.g., Distributed IO, valve terminals, fre-
quency converters, switches with integrated
PROFINET IO functionality)
Intelligent IO device
Function Manual, 12/2017, A5E03444486-AH
PROFINET with STEP 7 V15