System overview
4.1 Field of application
SIMATIC PN/CAN LINK
Operating Instructions, 03/2022, A5E39895388-AC
29
CAN transparent
• The PN/CAN LINK can be operated in "CAN transparent" mode.
• All CANopen functions are disabled in "CAN transparent" mode.
• Control information as well as status information is exchanged cyclically between the
PN/CAN LINK and the S7 controller in "CAN transparent" mode.
• Messages can be used in standard format as well as extended CAN format.
• Configured CAN messages with fixed message ID and fixed length can be used in "CAN
transparent" mode.
• Programmed CAN messages for which the message ID and the length (max. 8 bytes) is not
determined by the S7 user program until runtime can be used in "CAN transparent" mode.
• Users can send and receive CAN messages in the S7 automation program. For this
purpose, "Transmit proxy modules" and "Receive proxy modules" can be configured in the
TIA Portal.
• The PN/CAN LINK can forward data from received CAN messages to the S7 controller as
PROFINET input data.
• The PN/CAN LINK can send CAN messages with PROFINET output data of the S7 controller.
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