Lenze PROFIBU PC-based Automation Manual de usuario Pagina 59

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DMS 2.2 EN 07/2011 TD17 L 59
Control technology | PROFIBUS communication manual
Defining the minimum cycle time of the PLC project
Detecting the task utilisation of the application (T
Task utilisation
)
9.2.2 Detecting the task utilisation
Initial situation
A project with, for instance, a motion task and two 2 tasks of a lower priority is created
completely.
How to detect the task utilisation T
Task utilisation
:
1. For a first measurement of T
Task utilisation
the cycle times of all cyclic tasks in the PLC
system are set to 'long'.
Example: Motion task = 10 ms, all other cyclic tasks = 20 ms
2. Log in and load project.
3. After the system has started up completely, press the Reset button on the Task
processing tab.
The displayed task runtimes are reset.
4. Read the maximum computing time of the task with the highest priority that is
shown in the task configuration (T
Task utilisation
).
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