Lenze E94AxPExxxx - Manual (Page 55)

Lenze · 9400 Servo PLC· Reference manual · DMS 4.0 EN · 11/2013 · TD05/06
55
4 PLC functionality
4.5 Use of system blocks
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
4.5.1 Access via system variables
When you have implemented a system block into the control configuration of »PLC Designer«, you
can use its system variable in your project.
• In the editors of »PLC Designer«, use the function key to call the input assistance which,
among other things, lists all available system variables.
• In this chapter, the system variables can be found in the description of the corresponding
system block.
4.5.2 Access via absolute addresses
The inputs and outputs of the system blocks can also be accessed via absolute addresses according
to the IEC 61131-3 standard.
• For inputs, the notation "%IDa.b" applies
(X = data type, a = module number, b = double word address)
• For outputs, the notation "%QDa.b" applies
(X = data type, a = module number, b = double word address)
• Each system variable described in the following chapters comes with the corresponding
address.
4.5.3 Definition of the inputs and outputs
In order to establish a connection of the user program with the hardware, system blocks are
connected to the program organisation unit (POU).

Note!
The inputs and outputs are always classified from the program's point of view!
• Logic SB inputs are hardware outputs of the »9400 ServoPLC«.
• Logic SB outputs are hardware inputs of the »9400 ServoPLC«.
6%
2XWSXWV
6% 328
,QSXWV
2XWSXWV
,QSXWV