Analysis and Design of a Modern SCADA System

A4- 4

Reads a datagram from a UDP socket, returning the results in

data out. The function returns data when it receives any bytes, and

waits the full timeout ms only if it receives no bytes.

Connection ID is a network connection refnum that uniquely

identifies the UDP socket.

Max size is the maximum number of bytes to read. The default is

548. Windows If you wire a value other than 548 to this input,
     Windows might return an error because the function cannot read
     fewer bytes than are in a packet.
     Timeout ms is in milliseconds. If no bytes have been received
     within the specified time, the function completes and returns an
     error. The default is 25,000 ms. A value of –1 indicates to wait
     indefinitely.
     Error in describes error conditions that occur before this VI or
     function runs. The default is no error.
     Connection ID out returns the same value as connection ID.
     Data out contains the data read from the UDP datagram.
     Error out contains error information.
     port is the port of the UDP socket that sent the datagram.
     Address is the address of the computer where a datagram
     originates.

A 4. 9 UDP Close

Closes a UDP socket.

connection ID is a network connection refnum that uniquely

identifies the UDP socket you want to close.