TwinCAT tabs
CXxxxx-M930/B930
20
Version: 1.1
4.3.2
Sync Task
The SyncTask triggers the PROFINET task and thus the speed with which the PROFINET communication
operates.
Pay attention to the system utilization rate of your Embedded PCs. The shorter the PROFINET cycle time is,
the higher the total system utilization rate will be. A very high system utilization rate can lead to an ADS
connection no longer being triggered often enough and this connection may be interrupted.
1
2
3
No.
Description
1
This option is enabled by default. In this case the Sync task is triggered via
the variable mapping. If several tasks are linked to the PROFINET adapter,
the task with the higher priority is always used as the Sync task.
Pay attention to the Sync task. The Sync task must correspond to the value
x
2
, i.e. 1 ms, 2 ms, 4 ms, 8 ms, 16 ms etc. The Sync task of the PROFINET
controller must not be set under the Sync task of a PROFINET device.
Example: If the PROFINET device operates with a 4 ms Sync task, the
Sync task of the PROFINET controller may be set to 4 ms, 8 ms, 16 ms,
etc. In this case cycle times of 1 ms or 2 ms may not be used.
2
If the Sync task is set via the mapping, note that a breakpoint results in
interruption of the task, which also affects the PROFINET communication.
You can override this behavior by using the
Special Sync Task
option. The
PROFINET device then uses a Sync task that runs independent of the PLC
task.
3
At this point the name, cycle time and priority for the cycle time can be set.
