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RCLOSECONN
6.3 Socket Interface Information
The information for the eight socket interface sockets held by the Ethernet Port can be read out
with the T2N READ instruction. The Ethernet Port holds five words of socket status information
for each socket. User programs should access this information as necessary when using socket
interface transmission.
• Remote port TCP/UDP port number
• Remote port IP address
• TCP/UDP port number for this socket
• Socket status
Table 6.1 lists the structure of the socket interface information and the extended memory area
addresses.
Table 6.1 Socket Interface Information
Socket identifier
1 2 3 4 5 6 7 8
Remote port number (TCP only) 0F4BH 0F53H 0F5BH 0F63H 0F6BH 0F73H 0F7BH 0F83H
Remote port IP address (TCP only)
0F4CH
0F4DH
0F54H
0F55H
0F5CH
0F5DH
0F64H
0F65H
0F6CH
0F6DH
0F74H
0F75H
0F7CH
0F7DH
0F84H
0F85H
Local port TCP/UDP port number 0F4EH 0F56H 0F5EH 0F66H 0F6EH 0F76H 0F7EH 0F86H
Socket status 0F4FH 0F57H 0F5FH 0F67H 0F6FH 0F77H 0F7FH 0F87H
For UDP sockets, the remote port number and IP address data are invalid.
The socket status has the following structure.
F E D C B A 9 8 7 6 5 4 3 2 1 0
AOPENTCP
UDP POPEN
NOACK
RCV