Lenze PLC Designer PLC Designer (R3-1) - Manual (Page 109)

L-force | PLC Designer
Concepts and Base Components
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DMS 4.1 EN 03/2011 TD29 107
3.9 Application
• An "application" is a set of objects which are needed for running a particular
instance of the PLC program on a certain hardware device (PLC, controller). For this
purpose i.a. "independent" objects, managed in the POUs view, are instantiated
and assigned to a device in the Devices view. This meets the mind of object
orientated programming. However also purely application-specific POUs can be
used.
• An application is represented by an " Application" object in the Devices tree ,
insertable below a Plc Logic (programmable) device node. Below an application
entry the objects defining the applications "resource set" are to be inserted.
• All applications below the same device must have unique names.
• Before inserting an application object via the Add Object command select the
respective programmable device object entry in the Devices view, otherwise you
will not get offered object type "Application" in the 'Add Object' menu. In the 'Add
Application' dialog enter a desired name for the application and press button
'Open'. The application will be added to the Devices tree below the device entry.
• An essential part of each application is the Task Configuration controlling the run
of a program (POU instances or application-specific POUs). Additionally it might
have assigned resource objects like Global Variables Lists, Libraries etc., which - in
contrast to those managed in the POUs window - only can be used by the particular
application and its "childs", see Device, Device tree for the rules.
• Within a project several applications can be defined for the same device, i.e. can be
assigned to and run on the same controller. Thereby nested arrangement of the
applications is possible ("father"- and "child applications"). In this case the objects
assigned to the "father" can be used by the "child", not however vice versa, see
Device, Device tree for the rules.