9.3 PN/PN coupler
9.3.1 Principle of operation
Application
The PN/PN coupler is used to link two Ethernet subnets with one another and to exchange
data. The maximum size of the data that can be transferred is 16-byte input data and 16-byte
output data.
As a device, the PN/PN coupler has two PROFINET interfaces, each of which is linked to a
subnet. During configuring, two I/O devices are made from this one PN/PN coupler; this means
that there is one I/O device for each station with its own subnet. The other part of PN/PN
coupler is called the coupling partner. Once configuring has been completed, the two parts
are merged.
Example
The following example shows that the two networks are independent of one another. This
means that for each PROFINET IO network you assign dedicated device names.
In the following diagram, these are the device names "Subnet1" in network 1 and "Subnet2"
in network 2.
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Figure 9-3 Principal mode of operation of the PN/PN coupler (example)
References
SIMATIC bus couplings PN/PN coupler Hardware Installation and Operating Manual
Spare parts and accessories
9.3 PN/PN coupler
PPU and components
266 Manual, 05/2015, 6FC5397-2DP40-3BA4
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