Lenze Engineer v2.21 - Manual (Page 130)

Defining the system functionality
Terminology used
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Lenze · Engineer · 2.13 EN - 10/2014
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Ports for machine applications
You can define Ports for a machine application to realise an exchange of information between
different machine applications:
• In principle, not only applications but also machine applications that have already been
configured can be allocated to a machine application. This makes it possible to create
hierarchical application structures.
• An "electrical shaft" is an example of a machine application.  Establishing an interconnection
via an electrical shaft ( 186)
Application variables
The information to be exchanged between applications is called application variables.
• The corresponding application provides the application variable via an output port.
• A "control word" is an example of an application variable.
Element variables
An application variable consists of so-called Element variables.
• The corresponding application defines the application variable composition from the element
variables.
• Examples of element variables:
• Variable of the BOOL type for exchanging the "set controller inhibit" control signal.
• Variable of the DINT type for exchanging the speed setpoint.
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Note!
The definitions of the configurations which you generate within the functions are
network-independent!
• At first, the following specifications are not required for the definition that two
applications communicate with a specific cycle time via an application variable:
• The process data object the application variable is to be mapped to.
• The network the process data object must is to use for communication.