Lenze E94A - Manual (Page 21)

Lenze · 9400 function library · Reference manual · DMS 6.7 EN · 08/2014 · TD05
21
2 Introduction
2.4 Further objects of an interconnection
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2.4.1 System block
System blocks can be considered as a specific variant of a function block.
• In contrast to function blocks, system blocks are firmly integrated in the runtime system of the
controller and therefore are not instanceable.
• System blocks partly activate real hardware, e. g. the digital and analog inputs/outputs and the
motor control.
• The system blocks which are provided for a controller in the function block editor depend on the
respective device type.
[2-3] Example: System blocks "LS_AnalogInput" and "LS_AnalogOutput" for representing the analog inputs/outputs
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Tip!
The system blocks are described in detail in the software manual and in the online help for
the controller.
2.4.2 Port block
All input/output ports of the application can be inserted in the interconnection in the form of port
blocks, in order to receive access to the associated element variables.
[2-4] Example: Input port "LPortAxisIn1" and output port "LPortAxisOut1"
Input/output ports enable, for instance, the data exchange in an interconnection or with a master
control via a corresponding transmission medium (e.g. system bus).
 Name of the system block
 Button for opening the parameterisation dialog or the parameter list for the system block
 Button for opening the online help for the system block