10-7
Section
Results Storage Area Response Codes
186
Main code
Remedy
Probable cause
Sub-
code
22: Status error
(operating mode
disagreement)
0F
The same socket service is already in
progress at the specified socket number.
Use the socket status flag in PC memory to be
sure that socket service has finished before
starting services again.
10
The specified socket is not open.
Open the socket. For TCP sockets, be sure to
wait until connection is made.
11
The internal buffers are full because there
is too much traffic at the local node,
preventing data from being sent.
Correct the user application to reduce traffic at
the Ethernet Unit.
23: Environment
error (no such
Unit)
05
IP address conversion failed.
Check the IP address and subnet mask in the
System Setup and be sure that settings are
correct.
07
IP address conversion is set for automatic
conversion only.
Check the mode settings in the System Setup.
This error will be generated for the READ IP
ADDRESS command only.
Network Relay Errors
For network relay errors using SEND(090) or RECV(098), check the path of the
command using the routing tables and the nature of the error using the response
code to eliminate the cause of the error.
For network relay errors using CMND(490), the location of the relay error is re-
corded in the second through third words of the response, as shown below.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Main response code (MRES)
Sub response code (SRES)
Bit
1: PC Non-fatal Error Flag
1: PC Fatal Error Flag
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Error network address
Error node number
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
0
0
Bit
First word
Second word
Third word
Command code
1: Relay Error Flag
1st byte
2nd byte
10-7 Results Storage Area Response Codes
The response codes stored in the Results Storage Area can be used to trouble-
shoot 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 Storage 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 in-
volved when communicating between an Ethernet Unit and other devices.
Response
code
UNIX error
message
Description
Probable remedy
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 re-
mote IP address for active TCP
open)
Check the IP address of the remote node and
try to reconnect.
