Rockwell Automation 57C610 Enhanced Basic Language, AutoMax - Manual (Page 113)

8Ć3
function. This can be specified as a simple
variable or as an element of an array.
port% is the local port number you want to give to the
socket. Begin assigning TCP and UDP port
numbers at 5000.
For raw Ethernet sockets, this value is used to
select the value of the 16Ćbit packet type in the
message header.
This function assigns a local port number or Ethernet packet type to
a socket.
Values Returned:
ă1
Success
-2 ENI not initialized
-4 Did not bind socket
-9 No buffer space
-15 Bad socket number
For example:
STATUS% = BIND%( SN%, 5000 )
8.4 CONNECT% Function
Format:
CONNECT%( sn%, addr$, port% )
where:
sn% is the number of the socket you want to connect to
a destination. This is the value returned from the
SOCKET% function. This can be specified as a
simple variable or as an element of an array.
addr$ is the destination Internet or Ethernet address you
want to connect to. See ENI_INIT for applicable
rules for Internet addresses. Ethernet addresses
are 12Ćdigit Hex number strings.
port% is the destination port number you want to connect
to.
This function assigns a permanent destination for a socket. It must
be done before any messages can be sent using any of the three
protocols. For Raw Ethernet or UDP sockets, this function is used
only to specify the destination address. For TCP sockets, it directs
the ENI to do an active open. A passive open (ACCEPT%), done by
the destination TCP socket, must occur prior to this function being
executed to establish a connection. After the connection is made,
messages can be exchanged.
If connecting a TCP socket and the other end is not ready to accept
the connection, the socket will be closed. To try to connect again,
the application must create a new socket and bind it again.
For raw Ethernet sockets, the port number defines the packet type
of all messages that will be sent. The receiving end must do a
BIND% with the same value for the port number.