Lenze PROFIBU PC-based Automation - Manual (Page 59)

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
).