Siemens SIMATIC ET 200M

Product overview
1.3 What is PROFINET IO?
ET 200M
Operating Instructions, 12/2008, EWA-4NEB780600602-08
13
1.3 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 discards the hierarchical PROFIBUS master/slave concept and deploys a
provider/consumer principle instead. The modules of an I/O device that will be subscribed
to by an IO controller are defined within the engineering phase.
● The quantity framework is extended in accordance with the options offered on
PROFINET IO. Parameter limits are not exceeded during configuration.
● The transmission rate is 100 Mbps.
● The configuration interface for users is generally the same as that on PROFIBUS DP (the
system is configured in STEP 7 > HW CONFIG).
Topology of a PROFINET IO network
The figure below shows a typical PROFINET IO network topology. Existing PROFIBUS
slaves can be integrated using an IE/PB link.
(70
3*3&
IO-Controller
S7-300
IO-DeviceIO-Device
IO-Device
ET 200pro
PROFINET IO
(Industrial
Ethernet)
Switch
Switch
SwitchSwitch
IE/PB-
Link
PROFIBUS DP
ET 200S
OP 25
max. 100 m
Figure 1-2 Typical structure of a PROFINET IO network