Omron NX701-17 Series User Manual page 231

Item
Collision count
Short frames received
Overlength frames
received
Precautions for Correct Use Precautions for Correct Use
Even if communications are normal, values other than 0 may occur for the frame reception time-
out count and the number of CRC error frames received. Refer to EtherCAT Network Diagnostic
Procedure on page 9-50 to determine if the EtherCAT network is operating normally.
 Slave Diagnostic and Statistical Information
The following are the items displayed for the slave diagnostic and statistical information.
NJ/NX-series CPU Unit Built-in EtherCAT Port User's Manual (W505)
Displayed information
The total number of delay
collisions on the line after
start of transmissions.
The number of frames
received with less than 64
bytes.
The number of frames
received with more than
1,522 bytes.
Assumed cause of
increase
A repeater hub is con-
nected.
The frames on the Ether-
CAT network are cor-
rupted due to noise.
Computers or other non-
EtherCAT devices are
connected.
The frames on the Ether-
CAT network are cor-
rupted due to noise.
Computers or other non-
EtherCAT devices are
connected.
9 Troubleshooting
Possible correction
You cannot use repeater
hubs with EtherCAT com-
munications. See if there
are repeater hubs con-
nected to the EtherCAT
network and remove them
if there are any.
Refer to EtherCAT Net-
work Diagnostic Proce-
dure on page 9-50.
Refer to EtherCAT Net-
work Diagnostic Proce-
dure on page 9-50.
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