Lenze DDS v2.3 - Manual (Page 29)

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Program example
3-7
l
DDS EN 2.3
Pulse encoder TP
The pulse encoder TP has two inputs ( IN, PT) and two outputs ( Q, ET).
•
If at the input IN TRUE is applied, the output Q , for the time PT (in milliseconds) will return the
value TRUE.
•
ET outputs the time already expired in milliseconds.
Input variable Status Output variables Status/value
IN FALSE Q FALSE
ET 0
IN TRUE Q TRUE
(ET < PT)
ET 0 ì PT*
IN Q FALSE
(ET = PT)
ET PT
* The output ET counts the time in milliseconds.
To use the pulse encoder TP in the organization unit WAIT we must create a local instance of TP
:
28.Use the declaration editor to declare as local variable (between the keywords VAR and
END_VAR ) a variable named DELAY of type TP.
3.2.6.2 Instruction list
To implement the timer, the instruction list for the organization unit WAIT must be as follows:
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