Omron NX701-17 Series User Manual page 230

9 Troubleshooting
The values of the following items may increase if there is an EtherCAT network error.
The following table gives the description of each item, assumed cause of increase, and correction.
Item
Frame reception time-
out count
Reception buffer over-
flow count
Non-EtherCAT frames
received
Link OFF count
Discarded process
data receptions
Discarded message
receptions
CRC Error Frames
Received
Frame reception errors The number of frames
9-60
Displayed information
The number of frame
reception timeouts that
occurred.
The number of frames dis-
carded due to buffer over-
flows when receiving data.
The number of frames
received other than Ether-
CAT frames.
The number of times link
OFF was detected.
The number of process
data packets discarded
when receiving process
data.
The number of messages
discarded in mailbox
reception.
The number of frames
received that resulted in
CRC errors.
resulting in reception
errors from the Ethernet
controller (EtherMAC).
NJ/NX-series CPU Unit Built-in EtherCAT Port User's Manual (W505)
Assumed cause of
increase
A cause to a Process Data
reception Timeout
occurred, which increases
the Frame reception time-
out count.
The Frame reception time-
out count will increase
also when the count in the
CRC Error Frames
Received, Short frames
received, or Overlength
frames received
increases.
There are too many
frames on the EtherCAT
network that are not Eth-
erCAT frames.
There are frames on the
EtherCAT network that are
not EtherCAT frames.
A cause to a Link OFF
Error occurred.
Operations for which
multi-execution is prohib-
ited in Prohibition to Phys-
ically Disconnecting a
Slave and Resetting an
Error or Connecting a
Slave at the Same Time
on page 9-67 were exe-
cuted.
The value sometimes
increases when the net-
work is started or commu-
nicating EtherCAT slaves
are replaced.
A cause to an EtherCAT
Message Error occurred.
The frames on the Ether-
CAT network are cor-
rupted.
The frames on the Ether-
CAT network are cor-
rupted due to noise.
Possible correction
Refer to EtherCAT Net-
work Diagnostic Proce-
dure on page 9-50.
See if there are computers
or other non-EtherCAT
devices connected to the
EtherCAT network and
remove them if there are
any.
See if there are computers
or other non-EtherCAT
devices connected to the
EtherCAT network and
remove them if there are
any.
Refer to 9-2 Troubleshoot-
ing and remove the cause
of the error.
Refer to Prohibition to
Physically Disconnecting
a Slave and Resetting an
Error or Connecting a
Slave at the Same Time
on page 9-67.
Refer to 9-2 Troubleshoot-
ing and remove the cause
of the error.
Refer to EtherCAT Net-
work Diagnostic Proce-
dure on page 9-50.
Implement noise counter-
measures.