Which products are affected?
ESP-DDS2-P (Global Drive PLC Developer Studio Version 2.0, 2.1)
What happens?
In the CFC editor (Continuous Function Chart) an element output can be linked to several element inputs, e.g. the result of the operator ADD can be assigned several variables. The connection of elements is performed with lines. DDS automatically places connection points at line crossings and forks of elements connected to one another. This presentation is equivalent to that of an electrical circuit diagram.
Although an element output is linked to several element inputs, some or all of the connection points are not displayed on the lines between the elements.
When does the problem occur?
Depending on the position of the elements in the CFC editor and on the number of elements linked to one another it is possible that DDS fails to display some of the connection points.
Possible diagnostics?
By moving individual elements it is possible to see which elements are connected to one another.
Short-term measures/recommendations?
Position the elements in the CFC editor in such a way that all the connection points are displayed.
Evaluation:
As opposed to all other editors, line crossings are allowed in the CFC editor. That is, lines which are connected to one another and lines which are not connected to one another can cross over. Owing to the fact that not all the connection points are displayed, it is not possible to see which lines are connected. This makes troubleshooting more difficult. The presentation error has no effect on operation of the program in the PLC.
