Lenze PLC Designer PLC Designer (R3-1) - Manual (Page 91)

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Concepts and Base Components
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DMS 4.1 EN 03/2011 TD29 89
3.7.11 Global Network Variables List - GNVL
Note: This functionality is only available if supported by the currently used feature
set.
A global network variables list (GNVL) is only used in the device tree. It defines
variables, which are specified as network variables in another device within the
network.
Thus a GNVL object can only be added to an application, if a GVL with special network
properties (network variables list) is available in one of the other network devices, no
matter whether defined in the same or in different projects. If several of appropriate
GVLs are found within the current project for the current network, you can choose the
desired one from a selection list when adding a GNVL via the Add Object dialog. GVLs
from other projects must be imported, see below.
This means that each GNVL in the current device (receiver) corresponds exactly to one
GVL in another device (sender).
Besides a Name, also a Task, responsible for the handling of the network variables,
must be defined when adding the GNVL. Alternatively to directly choosing a
SenderGVL from another device, an export file *.gvl previously generated from that
GVL via the "Link to file" Properties can be specified. In any case this will be necessary if
the desired GVL is defined within another project. For this purpose select option
"Import from file" in the Sender selection list and then enter the file path in the
"Import from file:" edit field (use the standard dialog for browsing in the file system via
the
button). A special case is, if you want to set up a network variables
communication with a V2.3 project. Please see details in: Network Variables.
The settings can be modified at a later time via the Properties dialog (Network
Settings).
The basic GVL as well as the corresponding NVL list object get marked as "network
variables lists" by the icon in the devices tree.