Siemens Simatic S7-400

PROFINET
6.3 PROFINET IO Systems
S7-400 Automation System, CPU Specifications
Manual, 10/2006, 6ES7498-8AA04-8BA0
6-5
The figures show Examples of connection paths
The connection of company
network and field level
From PCs in your company network, you can access devices at the field level.
Example:
• PC - Switch 1 - Router - Switch 2 - CPU 41x PN/DP ①.
The connection between the
automation system and field
level
You can also access one of the other areas in Industrial Ethernet from an IO supervisor at
the field level.
Example:
• IO-Supervisor - Switch 3 - Switch 2 - on an IO device of the ET 200S
②.
The IO controller of the CPU
41x PN/DP ① directly controls
devices on the Industrial
Ethernet and on the
PROFIBUS
At this point, you see the extended IO feature between the IO controller and IO device(s)
on Industrial Ethernet:
• The CPU 41x PN/DP ①is the IO controller for one of the ET 200S ②
IO-Devices.
• The CPU 41x PN/DP ① is also the IO controller for the ET 200 (DP
slave) ⑤ via the IE/PB Link ⑥.
A CPU can be both
IO controller and
DP master.
Here, you can see that a CPU can be both IO controller for an IO device as well as DP
master for a DP slave:
• The CPU 41x PN/DP ①is the IO controller for the other ET 200S ②
IO-Devices.
CPU 41x PN/DP ③ - Switch 3 - Switch 2 - ET 200S ②
• The CPU 41x PN/DP ③ is the DP master for a DP slave ④. The DP
slave ④ is assigned locally to the CPU ③ and is not visible on Industrial
Ethernet.
Reference
For further information about PROFINET refer to the From PROFIBUS DP to PROFINET IO
programming manual.
This manual also provides a comprehensive overview of the new PROFINET blocks and
system status lists.