Lenze PLC Designer PLC Designer (R3-1) - Manual (Page 665)

L-force | PLC Designer
General Editors
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DMS 4.1 EN 03/2011 TD29 663
13.5 Data Source Editor
Note: This functionality is only available if supported by the currently used feature
set.
A Data Server can be added to the local application and serves to establish a point-to-
point connection between the local application and a remote data source. Thus data
items, i.e. variables, provided by other devices or (currently not yet possible) by OPC
Servers can be used and visualized in the local application. Multiple data sources might
be added to the data server of the local application.
Note: The data server does not replace the Network Variables functionality which is
already used with »PLC Designer« V2.3, but provides another, different way of data
exchange. Network variables allow data transfer basing on defined variables lists
and in broadcast mode.
Note: Bit accesses used in visualizations will only work over a Data Server
connection if the bit index is defined literally (and not by a defined constant).
The data server must be added as an object in the devices tree below an application.
Only one data server per application can be configured. Automatically the required
data server libraries will be included in the project.
The data source(s) to be handled by the data server also are to be added as objects,
below the data server.
The data source editor provides dialogs for the configuration of the particular data
sources. This concerns: which variables (data items) should be used, of which access
type should they be, which are the settings for the communication with the data
source, i.e. update of the values.
The data server and data source functionality is provided by the plug-ins
'DataSourceEditor' and 'DataSourceObject'.