Fins/Tcp Connection Status Read: 2731 - Omron CP1L-EL20DR-D Operation Manual

FINS Communications

FINS/TCP CONNECTION STATUS READ: 2731

Command Block
Response Block
27 31
Command Response
code code
Parameters
Reads the FINS/TCP connection status.
27 31
Command FINS/TCP
code connection No.
FINS/TCP Connection Local IP address
connection service
No.
FIFINS/TCP Connection No. (Command, Response)
Command: Specifies, in two bytes, the FINS/TCP connection number (1 to 3)
for which the status is to be read.
Response: Specifies the FINS/TCP connection number (1 to 3) for which the
status was read.
Connection Service (Response)
Specifies the service that is being used for the FINS/TCP connection as a
number.
0003: FINS/TCP server
0004: FINS/TCP client
Local IP Address (Response)
Specifies the IP address for the local node in hexadecimal.
Local TCP Port Number (Response)
Specifies the TCP port number for the local node.
Remote IP Address (Response)
Specifies the IP address for the remote node in hexadecimal.
Remote TCP Port Number (Response)
Specifies the TCP port number for the remote node.
TCP Transitions (Response)
Specifies the TCP connection status using the following numbers.
For details on TCP status changes, refer to Appendix H TCP Status Transi-
tions.
Number Status
00000000 CLOSED
00000001 LISTEN
00000002 SYN SENT
00000003 SYN RECEIVED
00000004 ESTABLISHED
00000005 CLOSE WAIT
00000006 FIN WAIT 1
00000007 CLOSING
00000008 LAST ACK
Local TCP Remote IP Remote TCP
port number address port number
Meaning
Connection closed.
Waiting for connection.
SYN sent in active status.
SYN received and sent.
Already established.
FIN received and waiting for completion.
Completed and FIN sent.
Completed and exchanged FIN. Awaiting ACK.
FIN sent and completed. Awaiting ACK.
Section 6-5
TCP transition
185