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Interbus Error (ILIB0010): The system variables update task '...' is invalid.

The interval at which the system variables of the INTERBUS master (IB_*) are updated must be configured by selecting an update task as follows:

  1. Double-click the INTERBUS master in the PLANT and then open the 'Settings' editor in the editors area.
  2. In the 'Settings' editor, select the 'Update task' category on the left.
  3. Select the desired task from the drop-down list 'System and global variables'.

The task which is currently selected does not exist in your project. Probably the selected task has been renamed since selecting it from the drop-down list.

Remedy

Select an existing task as described above.
If no task is selected here, the update is done in an interval of 50 ms.