Omron Sysmac NY512-1300, Руководство пользователя

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9 Socket Service
9-2 NY-series Industrial Panel PC / Industrial Box PC Built-in EtherNet/IP Port User’s Manual (W563)
9-1 Basic Knowledge on Socket
Communications
A socket is an interface that allows you to directly use TCP or UDP functions from the user program. In
a host computer (e.g., personal computer), sockets are provided in the form of a C language interface
library. If you load the library, you can program communications via TCP and UDP in the user program.
In a UNIX computer, a socket interface is provided in the format of system calls. For the built-in Ether-
Net/IP port, you execute instructions in the user program to use sockets. You can use these communi-
cations services to send and receive any data to and from remote nodes, i.e., between host computers
and Controllers or between Controllers. The built-in EtherNet/IP port provides a UDP socket service
and a TCP socket service.
Ports 0 to 1023 used for TCP/IP are reserved as well-known ports . In addition, ports 1024 to 49151 are
reserved as registered ports by the protocols that are used. Therefore, we recommend that you use
port numbers 49152 to 65535 for applications other than the protocols that are registered with the
socket service.
You cannot specify port number 0 for the built-in EtherNet/IP port. Also, make sure that the following
ports, which are used by the built-in EtherNet/IP port, are not used for other purposes.
* These are the default port numbers. You can change the port numbers in the settings.
9-1-1 Sockets
9-1-2 Port Numbers for Socket Services
Application UDP TCP
FTP server --- 20, 21*
DNS 53 ---
BOOTP client 68 ---
HTTP server --- 80
NTP server 123* ---
SNMP Agent 161* ---
SNMP trap 162* ---
UDP 9600 ---
TCP --- 9600*
Used by system. 2222, 2223, and 2224 9610, 9900
CIP messages 44818 44818