Omron CS CJ1W-ETN21 Operation Manual page 203

FINS/TCP Method
FINS FRAME SEND
ERROR NOTIFICATION
Command
CONNECTION
CONFIRMATION
Command
Header
Length
FINS/TCP header
Command
Error code
FINS frame
FINS frame
The details of the above frame are shown in the following table.
Item Contents (hexadecimal)
Header 46494E53
Length 00000014 to 000007E4
Command 00000002
Error code 00000000
FINS frame ---
If an error occurs in the FINS/TCP header of the FINS FRAME SEND com-
mand, this command is used so that an error code will be returned to the node
that sent the FINS FRAME SEND command by the node that detected the
error. When this command is sent, the source node closes the connection.
The node that receives the command must close the connection quickly.
Header
Length
FINS/TCP header
Command
E rro r code
The details of the above frame are shown in the following table.
Item Contents (hexadecimal)
Header 46494E53
Length 00000008
Command 00000003
Error code ---
The following table shows the list of error codes.
Error code
(hexadecimal)
00000000 Normal
00000001 The header is not 'FINS' (ASCII code).
00000002 The data length is too long.
00000003 The command is not supported.
This command is sent when the FINS NODE ADDRESS DATA SEND (CLI-
ENT TO SERVER) command is received from a client with the same IP
address and FINS node address as another client with a connection that is
already established. The client that receives this command will simply destroy
the frames.
Size
(bytes)
4
4
4
4
12 to 2,012 (Refer to 7-2 FINS Frames for details.)
ASCII code: 'FINS'
20 to 2020 bytes: Length of
data after command.
Not used, so does not require
checking by at the receiving
end.
From FINS header ICF to end
of data.
Size
(bytes)
4
4
4
4
ASCII code: 'FINS'
8 bytes: Length of data from
command onwards.
Refer to the following table of
error codes.
Details
Section 7-4
Remarks
Remarks
179