Diagnostic Messages - Siemens Simatic Operating Instructions Manual

Diagnostics
10.2 Diagnostic messages to the S7 controller
10.2.2

Diagnostic messages

Diagnostics
Mode Module /
submodule for which
the diagnostic infor-
mation is signaled
Manager, CANopen Manager
Slave, CANopen Slave
Transparent CAN transparent
Manager, CANopen Manager
Slave, CANopen Slave
Transparent CAN transparent
Manager, CANopen Manager
Slave, CANopen Slave
Transparent CAN transparent
Manager, CANopen Manager
Slave, CANopen Slave
Transparent CAN transparent
Manager, CANopen Manager
Slave CANopen Slave
Slave CANopen slave
Slave CANopen slave
Manager, CANopen Manager
Slave, CANopen Slave
Transparent CAN transparent
Manager, CANopen Manager
Slave, CANopen Slave
Transparent CAN transparent
102
Channel diagnostics Cause of error and possible solution
error
CAN bus cannot be CAN messages can no longer be sent or received.
reached Check for errors in the hardware installation (e.g. terminat-
("Bus Off" state) ing resistor, etc.) or communication settings (e.g. trans-
mission rate, etc.).
CAN bus in the "Error In this state, the device can no longer initiate repetition of
Passive" state defective CAN messages.
Check for errors in the hardware installation (e.g. terminat-
ing resistor, etc.) or communication settings (e.g. trans-
mission rate, etc.).
The error may also occur if no other devices are connect-
ed to the CAN bus.
Overflow of the CAN Received CAN messages were lost.
receive buffer Reduce the CAN transmission rate, increase the
PROFINET cycle time or reduce the PROFINET IO data to
be transmitted.
Overflow of the CAN CAN messages to be sent could not be sent and were
transmit buffer discarded.
This is caused by too much CAN communication traffic or
when other problems occurred in the CAN communication
("Bus Off" or "Error Passive" state). If neither "Bus Off" nor
"Error Passive" state exists, try reducing the amount of
communication traffic or increasing the CAN bit rate.
Received PDO with The received PDO with COB ID {1:x} has a different length
COB ID {1:x} has in- than the configured length and is therefore discarded.
correct length Correct the PDO configuration.
Error control (heart- No heartbeat message was received from node {1:d} in
beat) signals an error - the specified time. The error response configured in OD
for node {1:d} 1029 is executed.
Check whether node {1:d} has failed and whether the
monitoring time is correctly configured.
Error control (node No node guarding request was received from the manager
guarding) signals an within the specified time. The error response configured in
error OD 1029 is executed.
Check whether the master has failed and whether the
monitoring time is correctly configured.
Hardware fault detect- Hardware faults were detected when switching on the
ed: - ({1:x}). module.
The module must be replaced.
Internal communica- Received and sent CAN messages may have been lost.
tion error detected. Check for communication problems caused by EMI. If
these can be excluded, there may be a hardware fault and
the module must be replaced.
SIMATIC PN/CAN LINK
Operating Instructions, 03/2018, A5E39895388-AB