Siemens SIMATIC S7-400H System Manual page 98

PROFINET
8.2 PROFINET IO systems
The graphic shows
The connection of company
network and field level
Connections between the
automation system and field
level
The IO controller of CPU
①
41x5 PN/DP
sets up PROFINET IO
system 1 and directly
controls devices on
Industrial Ethernet and
PROFIBUS.
The fault-tolerant system,
consisting of CPU 41x-5H
PN/DP
② ③
+ , sets up the
PROFINET system 2 as IO
controller.
A one-sided IO device is
operated in system
redundancy in addition to IO
devices at this IO controller.
Further information
You will find further information about PROFINET in the documents listed below:
● In the PROFINET system description
● In the
98
Examples of connection paths
You can access devices at the field level from PCs in your company network
Example:

PC - Switch 1 - Router - Switch 2 - CPU 41x-5H PN/DP
You can also access other areas on the Industrial Ethernet from a programming device at
the field level.
Example:
Programming device - integrated Switch 3 - Switch 2 - Switch 4 - integrated Switch

CPU 41x-5H PN/DP
At this point, you can see the IO feature between the IO controller, intelligent device, and the
IO devices on Industrial Ethernet:
The CPU 41x-5 PN/DP

and for the intelligent device CPU 317-2 PN/DP
The CPU 41x-5H PN/DP

IE/PB Link.
The fault-tolerant system, consisting of CPU 41x-5H PN/DP
system 2 as IO controller. A one-sided IO device is operated in system redundancy on this
IO controller in addition to IO devices.
Here you see that a fault-tolerant system can operate system-redundant IO devices as well
as a one-sided IO device:
The fault-tolerant system is the IO controller for both system-redundant IO devices ET

⑦ ⑧
200 + as well as the one-sided IO device
(http://support.automation.siemens.com/WW/view/en/19292127) manual
From PROFIBUS DP to PROFINET IO programming manual.
This manual also provides a clear overview of the new PROFINET blocks and system
status lists.
③
- on IO device ET 200
①
is the IO controller for the IO device ET 200
①
is also the master for the DP slave
①
.
⑧
.
④
.
⑩
via the
② ③
+ , sets up PROFINET
⑨
.
System Manual, 03/2012, A5E00267695-11
⑤
, for Switch 3
S7-400H