Canopen Fieldbus Master Diagnosis - Festo CPX-CEC Series Manual

CPX-CEC-...
1.9.3

CANopen fieldbus master diagnosis

For diagnosis of the CAN string, the following diagnostic information is provided in online mode with the
CANopen master:
Diagnostic Remarks
information
Receive message Number of CAN messages received.
count
Transmit message Number of CAN messages transmitted.
count
Receive error Maximum value of the receive error counter (see information below).
count (max)
Transmit error Maximum value of the transmit error counter (see information below).
count (max)
Receive error Current value of the receive error counter (RECEIVE ERROR COUNT in
count (current) accordance with CAN Specification 2.0).
The value should be 0 if possible.
–
<![endif]&gt;A value of 96 or higher is referred to in the CAN Specification as a
–
"heavily disturbed bus".
A value of 128 or higher means that the node is in the "Error passive" status.
–
Sendefehler Current value of the transmit error counter (TRANSMIT ERROR COUNT in
(aktuell) accordance with CAN Specification 2.0).
The value should be 0 if possible.
–
A value of 96 or higher is referred to in the CAN Specification as a "heavily
–
disturbed bus".
<![endif]&gt;A value of 128 or higher means that the node is in the "Error
–
passive" status.
A value of 256 or higher means that the node is in the "Bus off" status.
–
Controller Status The current status of the CAN node in accordance with CAN Specification 2.0:
<![endif]&gt;CANC_STATE_NORMAL: Normal operating status, all error
–
counters < 128.
CANC_STATE_PASSIVE: Receive error counter > 127 or transmit error counter
–
> 127.
CANC_STATE_BUS_OFF: Transmit error counter > 255.
–
"Error passive" This counter specifies how often the CANC_STATE_PASSIVE status has been
count reached.
"Bus off" count This counter specifies how often the CANC_STATE_BUS_OFF status has been
reached.
The maximum values provide reference values for determining whether there are errors on the
bus. However, there is no guarantee that all counter value changes have been recorded.
"Reset counters" resets all counters apart from the current receive/transmit error counts to 0.
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