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A network variable list (sender) is used for declaring and listing global variables that should be sent to network variable lists (receiver) of other devices or network projects.

You add the object to the device tree by clicking “Add Object  Network Variable List (Sender)” of an application.

You can configure the protocol and transfer parameters in the “Add Network Variable List (Sender)” dialog box or “Properties” dialog box of the object in the “Network Variables” tab.

Dialog Box 'Add Network Variable List (Sender)'

Function: This dialog box defines the network properties for the sender NVL. When you close the dialog box, CODESYS adds the sender NVL of the application to the device tree.

Call: Main menu “Project  Add Object  Network Variable List (Sender)” while the application is selected in the device tree.

This dialog box corresponds to the “Network Variables” tab in the “Properties” of the network variable list object.