Table Of Contents

TCP Open Connection (G Dataflow)

Version:
    Last Modified: March 15, 2017

    Opens a TCP network connection using a specified address and port or service name.

    Use the TCP Close Connection node to close the connection.

    Programming Patterns
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    address

    The address with which you want to establish a connection. This address can be in IP dot notation or it can be a hostname. If you do not specify an address, the software establishes a connection to the local computer.

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    remote port or service name

    The port or name of the service to which you want to establish a connection. Specify a service name to query the NI Service Locator for the port number that the server registered. Wiring a value of 0 returns an error. remote port or service name can accept a numeric or a string input.

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    timeout ms

    Time, in milliseconds, that the node waits to complete before returning a timeout error. A value of -1 indicates to wait indefinitely.

    Default: 60,000 ms (1 minute)

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    error in

    Error conditions that occur before this node runs.

    The node responds to this input according to standard error behavior.

    Standard Error Behavior

    Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

    error in does not contain an error error in contains an error
    If no error occurred before the node runs, the node begins execution normally.

    If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

    If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

    Default: No error

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    local port

    The local connection port. Some servers allow connections to clients that use port numbers only within a specific range that is dependent on the server. If the value is 0, the operating system selects an unused port.

    Default: 0

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    connection ID

    A network connection refnum that uniquely identifies the connection. Use this value to refer to this connection in subsequent node calls.

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    error out

    Error information.

    The node produces this output according to standard error behavior.

    Standard Error Behavior

    Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

    error in does not contain an error error in contains an error
    If no error occurred before the node runs, the node begins execution normally.

    If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

    If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

    Where This Node Can Run:

    Desktop OS: Windows

    FPGA: This product does not support FPGA devices


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