Functions
5.1 CANopen
SIMATIC PN/CAN LINK
Operating Instructions, 03/2022, A5E39895388-AC
53
Error responses
The PN/CAN LINK saves the current state of the slaves configured in the HSP. When a
monitored CANopen slave fails or changes to an unexpected state, the PN/CAN LINK signals
corresponding diagnostic information to the S7 controller. If the slave is configured as
"mandatory in the network", the specified error response is executed.
The following reactions can be set for the failure of a mandatory node:
Reaction
Description
Restart of
triggering node
The CANopen slave is reset with NMT and the boot-up procedure including
configuration is restarted for this slave. The state of the PN/CAN LINK and the state
of the other CANopen slaves does not change.
Restarting the
device (PN/CAN
LINK) and all
nodes
All CANopen slaves are reset via NMT and the boot-up procedure including
configuration is restarted for all slaves.
Stop link and all
nodes
The state of the PN/CAN LINK changes to "CAN network Stopped" and all CANopen
slaves are set to "Stopped" via NMT. The state can be exited with a reset (either by
the reset bit in the cyclic data from the S7 controller or by configuring the PN/CAN
LINK again with the S7 controller).
Note: Use this response to troubleshoot the CAN bus.
Note
•
CANopen slaves that are not configured as "mandatory" by the user do not trigger the set
error response. When such a slave fails or signals an unexpected state, the slave is reset
with NMT and the boot-up procedure including configuration is restarted for this slave.
The gateway state and the state of the other CANopen slaves does not change.
•
If the error response is "Restart of the device (PN/CAN LINK) and all nodes" or "Stop link
and all nodes", the following applies: The triggered error response has an effect on the
"mandatory" slaves as well as those that were not configured as "mandatory" by the user.
As of firmware version V2.0:
•
When the "Enable diagnostic alarms for not mandatory nodes" check box is selected, the
master works exactly as the original device version 1.0. This means all error messages are
sent to the diagnostic buffer and the ERROR LED lights up.
•
When the "Enable diagnostic alarms for not mandatory nodes" check box is cleared, no
error messages are sent to the diagnostic buffer and the ERROR LED remains off.
Summary of Contents for SIMATIC PN/CAN LINK
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