Rockwell-automation 1768-EWEB EtherNet/IP Web Server Module User Manua Manual do Utilizador descarregar pdf (Página 143)

Publication ENET-UM527E-EN-P - October 2006

Socket Interface 143

Considerations

Use the instance returned by CreateSocket on subsequent service

requests.

Use a MOV instruction to move the instance to another MSG tag (the

.Instance field).

If you use a local port number that is already in use by the web server,

you receive an EADDRINUSE error (see Error Codes section). The

web server uses these port numbers:

• 20, 21 – FTP

• 25 – SMTP

• 80 – HTTP

• 123 – NTP

• 161 – SNMP

• 2222 – EtherNet/IP

• 44818 – EtherNet/IP

OpenConnection

The OpenConnection service does one of the following:

• Opens a TCP connection with the specified destination address

• For UDP, associates a destination IP address and port number

with the specified socket

MSG Configuration Parameters

To call this service, click in the MSG instruction and enter the

values displayed below.

Parameter Value

Service Type OpenConnection

Service Code 4c

Class 342

Instance from CreateSocket

Attribute 0

1 2 ... 138 139 140 141 142 143 144 145 146 147 148 ... 169 170

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Rockwell-automation 1768-EWEB EtherNet/IP Web Server Module User Manua Manual do Utilizador Página 143