Omron NJ101-10 Series, User Manual

Page: 212 / 280

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
Displayed informa-
tion
Assumed cause of increase Possible correction
Frame reception
timeout count The number of frame
reception timeouts
that occurred. A cause to a Process Data
Reception Timeout error occurred.
The Frame reception timeout count
will increase also when the count in
the CRC Error Frames Received,
Short frames received, or Overlength
frames received increases.
Refer to EtherCAT Network Diagnos-
tic Procedure on page 9-3.
Reception buffer
overflow count The number of
frames discarded due
to buffer overflows
when receiving data. There are too many frames on the
EtherCAT network that are not Ether-
CAT frames. See if there are computers or other
non-EtherCAT devices connected to
the EtherCAT network and remove
them if there are any.
Non-EtherCAT
frames received The number of
frames received other
than EtherCAT
frames. There are frames on the EtherCAT
network that are not EtherCAT
frames. See if there are computers or other
non-EtherCAT devices connected to
the EtherCAT network and remove
them if there are any.
Link OFF count The number of times
link OFF was detect-
ed. A cause to a Link OFF Error
(84200000 hex) event occurred.
Refer to a Link OFF Error (84200000
hex) event in the NJ/NX-series
Troubleshooting Manual (Cat. No.
W503)
and remove the cause of the
error.
Discarded process
data receptions The number of proc-
ess data packets dis-
carded when receiv-
ing process data. Operations for which multi-execution
is prohibited in
9-3-2 Prohibition to
Physically Disconnecting a Slave
and Resetting an Error or Connect-
ing a Slave at the Same Time
on
page 9-25 were executed.
The value sometimes increases
when the network is started or com-
municating EtherCAT slaves are re-
placed.
Refer to 9-3-2 Prohibition to Physi-
cally Disconnecting a Slave and Re-
setting an Error or Connecting a
Slave at the Same Time
on page
9-25.
Discarded mes-
sage receptions The number of mes-
sages discarded in
mailbox reception. A cause to an EtherCAT Message
Error (842D0000 hex) or Illegal
Mailbox Received (84350000 hex)
event occurred.
Refer to an EtherCAT Message Error
(842D0000 hex) or Illegal Mailbox
Received (84350000 hex) event in
the NJ/NX-series Troubleshooting
Manual (Cat. No. W503) and remove
the cause of the error.
CRC error frames
received The number of
frames received that
resulted in CRC er-
rors. The frames on the EtherCAT net-
work are corrupted. Refer to EtherCAT Network Diagnos-
tic Procedure on page 9-3.
Frame reception
errors The number of
frames resulting in re-
ception errors from
the Ethernet control-
ler (EtherMAC). The frames on the EtherCAT net-
work are corrupted due to noise. Implement noise countermeasures.
Refer to
4-2-1 Installation Precau-
tions on page 4-12 for details.
9 Troubleshooting
9-14
NJ/NX-series CPU Unit Built-in EtherCAT Port User's Manual (W505)