Siemens SIMATIC ET 200S - What is PROFINET IO?

Product Overview
1-4
ET 200S Distributed I/O System
EWA-4NEB 780602402-12
1.2 What is PROFINET IO?
PROFINET IO is the open transmission with realtime functions defined in
accordance with the PROFINET standard.
The standard defines a manufacturer-independent communication, automation and
engineering model.
Industrial quality connection designs are available for wiring the PROFINET
components.
• PROFINET does not use the hierarchical PROFIBUS master-slave principle. A
provider-consumer principle is used instead. The planning process specifies
which modules of an I/O device will be subscribed to an I/O controller.
• 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 view during configuration is generally the same as that on the
PROFIBUS DP (STEP 7 → HWCONFIG is used for configuration).
Structure of a PROFINET IO network
The figure below illustrates a typical PROFINET IO network structure. Existing
PROFIBUS slaves can be integrated by an IE/PB link.
I/O controller
S7-300
I/O device
ET 200S
Programming
device
OP 25
I/O device
ET 200S
max. 100 m
PROFINET IO
(Industrial
Ethernet)
Switch SwitchSwitchSwitchSwitch
IE/PB
link
PROFIBUS DP
Figure 1-2 A typical PROFINET IO network structure