Can Transparent; Overview; State Model - Siemens Simatic Operating Instructions Manual

EMCY messages
The EMCY messages sent in case of error are permanently specified and cannot be
configured by the user.
In "CANopen Manager" mode, users can configure whether diagnoses are sent to the S7
controller by the PN/CAN LINK in case of error.
Received EMCY messages are signaled to the IO controller in extended PROFINET
diagnoses. This function can be activated or deactivated through configuration.
See EMCY messages (Page 22).
LEDs
The PN/CAN LINK signals its state in "CANopen Manager" mode and in "CANopen Slave"
mode with the LEDs on the front of the housing. For the meaning of the LEDs, refer to
section Operating state of the PN/CAN LINK / PROFINET diagnostics (Page 95).
4.2

CAN transparent

4.2.1

Overview

All CANopen functions are disabled in "CAN transparent" mode. The operating mode for the
PN/CAN LINK is set via the associated HSP in the TIA Portal.
4.2.2

State model

In "CAN transparent" mode the PN/CAN LINK has the two states "OFF" and "ON".
PN/CAN LINK state "OFF"
No CAN frames are transmitted or received in this state. The CAN controller does not
participate in the CAN bus communication. It does not transmit or receive messages or any
error frames.
If the PN/CAN LINK is not connected to an S7 controller or if the data from the S7 controller
has the IO provider status "Bad", the PN/CAN LINK goes to "OFF" state.
PN/CAN LINK state "ON"
In this state the PN/CAN LINK participates in the CAN bus communication, that is it transmits
and receives CAN frames unless the CAN controller is in Bus Off state.
SIMATIC PN/CAN LINK
Operating Instructions, 03/2018, A5E39895388-AB
Functions
4.2 CAN transparent
43