FINS/TCP Method

Section 7-4

FINS FRAME SEND ERROR NOTIFICATION Command

CONNECTION

CONFIRMATION

Command

 

 

Size

 

 

(bytes)

 

 

4

 

Header

FINS/TCP header

Length

4

Command

4

 

 

Error code

4

 

 

FINS frame

FINS frame

12 to 2,012 (Refer to 7-2 FINS Frames for details.)

The details of the above frame are shown in the following table.

Item

Contents (hexadecimal)

Remarks

 

 

 

Header

46494E53

ASCII code: ‘FINS’

 

 

 

Length

00000014 to 000007E4

20 to 2020 bytes: Length of

 

 

data after command.

 

 

 

Command

00000002

 

 

 

 

Error code

00000000

Not used, so does not require

 

 

checking by at the receiving

 

 

end.

 

 

 

FINS frame

---

From FINS header ICF to end

 

 

of data.

 

 

 

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.

 

 

Size

 

 

(bytes)

 

Header

4

FINS/TCP header

Length

4

Command

4

 

 

Error code

4

The details of the above frame are shown in the following table.

Item

Contents (hexadecimal)

Remarks

 

 

 

Header

46494E53

ASCII code: ‘FINS’

 

 

 

Length

00000008

8 bytes: Length of data from

 

 

command onwards.

 

 

 

Command

00000003

 

 

 

 

Error code

---

Refer to the following table of

 

 

error codes.

The following table shows the list of error codes.

Error code

Details

(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.

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Omron CJ1W-ETN21 operation manual Fins Frame Send Error Notification Command