Siemens S7-300 appendix Profinet IO System Extended Functions of Profinet IO, Graphic displays

Communication 3.2 Communication services

3.2.10.1PROFINET IO System

Extended Functions of PROFINET IO

The following graphic shows the new functions of PROFINET IO

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The graphic displays	You can see the connection path in the graphic
The connection of company	From PCs in your company network, you can access devices at the field level
network and field level	Example:
	• PC — Switch 1 — Router — Switch 2 — CPU 31x-2 PN/DP (1).
The connection between the	You can, of course, also access other areas in Industrial Ethernet from a PG at the field
automation system and field	level.
level	Example:
	• PG — Switch 3 — Switch 2 — to an IO device of the ET 200S (2).
The IO controller of the CPU	At this point, you see the extended IO feature between the IO controller and IO device(s)
31x-2 PN/DP (1) controls	on Industrial Ethernet:
devices on Industrial Ethernet	• The CPU 31x-2 PN/DP (1) is the IO controller for one of the ET 200S (2) IO devices.
and on PROFIBUS directly	• The CPU 31x-2 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	Here, you can see that a CPU can be both IO controller for an IO device as well as
controller and DP master	DP master for a DP slave:
	• The CPU 31x-2 PN/DP (3) is the IO controller for the other ET 200S (2) IO device.
	CPU 31x-2 PN/DP (3) — Switch 3 — Switch 2 — ET 200S (2)
	• The CPU 31x-2 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.

CPU 31xC and CPU 31x, Technical data	3-19
Manual, Edition 08/2004, A5E00105475-05