Справочник Пользователя для Omron CS1W-ETN11

The response codes stored in the Results Storage Area can be used to trou-
bleshoot socket service problems. Refer to 6-2 Using Socket Services with
Socket Service Request Switches or 6-3 Using Socket Services with
CMND(490) for the location of the response codes stored in the Results Stor-
age Area.

The UNIX socket service error messages corresponding to the response
codes are given in the following table. Refer to the documentation for the
devices involved when communicating between an Ethernet Unit and other
devices.

0003

ESRCH

No such process

Close the local socket and try reopening it.

0006

ENXIO

No such device or address

0009

EBADF

Bad file number (incorrect socket 
specification)

000D

EACCES

Permission denied
(Broadcast address specified for 
remote IP address for active TCP 
open)

Check the IP address of the remote node and 
try to reconnect.

000E

EFAULT

Bad address (copy failed between 
kernel and user area)

Close the local socket and try reopening it.

0011

EEXIST

File exists

0016

EINVAL

Invalid argument (socket library 
argument error)

0018

EMFILE

Too many open files (More than 32 
sockets)

0020

EPIPE

Broken pipe (remote node closed 
socket)

Close the local socket.

003C

EPROTONO-
SUPPORT

Protocol not supported (protocol 
other than UDP, TCP, or RAW speci-
fied)

Close the local socket and try reopening it.

003D

EPROTOTYPE

Protocol wrong type for socket

003E

ENOBUFS

No buffer space available

There is too much load (traffic) on the Ethernet 
Unit. Check your user applications.

003F

EISCONN

Socket is already connected (con-
nection attempted to open socket)

Close the local socket and try reopening it.

0040

ENOTCONN

Socket is not connected (send 
attempted to closed socket)

0041

EALREADY

Operation already in progress (con-
nection attempted to existing non-
block connection)

0042

EMSGSIZE

Message too long

Check the length of send data.

UDP or TCP: 

1 to 1,982 bytes

UDP broadcasts: 1 to 1,472 bytes