System overview
4.2 System configuration
SIMATIC PN/CAN LINK
30 Operating Instructions, 03/2022, A5E39895388-AC
4.2 System configuration
System configuration
The figure below shows a basic system configuration with a PN/CAN LINK as communication
gateway between a PROFINET network and a CAN network.
Figure 4-2 System configuration with PN/CAN LINK
Purpose and function of the system components
The PN/CAN LINK enables the connection of PROFINET to CAN.
The communication of the PN/CAN LINK with the CPU of the S7 controller takes place
exclusively over the PROFINET interface.
From the PROFINET view, the PN/CAN LINK is an IO device according to Conformance Class B
(CC-B).
The cyclic data exchange between the PN/CAN LINK and the connected SIMATIC CPUs is based
on updating the IO image. Acyclic communication takes place by means of "Read/write data
record" services.
An external power supply unit with 24 V DC or the 24 V power supply of the SIMATIC S7
system provides the power supply of the PN/CAN LINK.
The TIA Portal is used for configuring. A corresponding HSP is available for this purpose. The
configuration of CANopen slaves is based on device description files (EDS) that are imported.
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