Omron CJ2-CPU User Manual

A - 43
Appendices
NX-series EtherNet/IP Coupler Unit User’s Manual (W536)
A-2 TCP/UDP Message Service
A
A-2-6 Troubleshooting Errors Related to the TCP/UDP Message Service
Additional Information
Refer to A-2-4 TCP/UDP Message Service Specifications on page A-38 for information on
TCP/IP port number and UDP/IP port number setting ranges.
Use the following information to determine the cause and corrective actions of problems in the
TCP/UDP message service.
A-2-6 Troubleshooting Errors Related to the TCP/UDP Message Ser-
vice
Observation General status Cause Corrective action
Reading or writing data
is not possible.
An error response is
returned by the Ether-
Net/IP Coupler Unit.
NOT_ENOUGH_DATA
(0x13)
The total frame size is
larger than 504 bytes.
The data-field size value
does not match the actual
received frame size.
Ensure the frame size field is
correctly calculated.
Refer to A-2-4 TCP/UDP
Message Service Specifica-
tions on page A-38 for more
information.
TOO_MUCH_DATA
(0x15)
The data field size value
does not match the actual
received frame size.
Other error codes
---
Refer to A-1 Supported CIP
Objects on page A-3 and
General Status Code on page
A-30.
Reading or writing data
is not possible.
No error response is
returned by the Ether-
Net/IP Coupler Unit.
---
The frame length is
smaller than the minimum
frame length of 12 bytes.
Ensure the size of the frame
is within specifications.
---
The data field size value
does not match the actual
transmitted number of
bytes.
Ensure the size of the frame
is the same as the specified
number of bytes in the data
field.
---
Unstable network commu-
nications.
Check network connections
and other sources of interfer-
ence.
Refer to Section 7 Ether-
Net/IP Network Wiring for
more information.
---
The TCP/UDP message
service has not been
enabled in the EtherNet/IP
Coupler Unit. (Tag data
links are enabled.)
Check the position of DIP
switch pin 3.
Refer to 4-3-2 DIP Switch on
page 4-9 for more informa-
tion.
---
The frame is sent to an
EtherNet/IP Coupler Unit
with an incorrect port
number setting.
Check the port number set-
ting.
Refer to A-2-5 TCP/IP and
UDP/IP Port Number Setting
on page A-41.
An unexpected frame
size restriction violation
occurred during usage of
the TCP/UDP message
service.
---
The MTU/maximum data-
gram size is less than the
required frame length.
Ensure the maximum frame
size is the same or less than
the maximum allowed data-
gram size on the client.

Omron CJ2-CPU Specifications

General

Brand	Omron
Model	CJ2-CPU
Category	Controller
Language	English