Configuring/Programming
10.3 Configuring CAN transparent
SIMATIC PN/CAN LINK
Operating Instructions, 03/2022, A5E39895388-AC
135
Adapting I/O addresses
If necessary, you must adapt the I/O addresses assigned automatically by the TIA Portal.
This is possible, for example, in the "Device overview" window. Here you can also find the I/O
addresses used by the slots. The addresses assigned to slot 1, that is the "CAN transparent"
module, are especially important because the control and status information is exchanged
with the S7 program via these addresses. It is important for startup of the PN/CAN LINK that
the control information transmitted here from the S7 program is set correctly.
Checking data consistency
You can check the consistency of the assignments for the receive data and transmit data as
well as the data types used with a compilation.
Setting CAN communication to "ON" via S7 user program
To enable transmission of data between the S7 controller and the PN/CAN LINK, you must set
a control bit to "1" via the S7 user program. This control bit is cyclically transmitted from the
S7 controller to the PN/CAN LINK as part of the IO data.
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