Cause
Possibility 1
You have drawn a PLC box in the schematic that does not contain PLC connection points.
Possibility 2
You have created a non-placed PLC box with symbol data in a project navigator (for example in the PLC or in the device navigator) to which no PLC connection points are assigned.
Solution
Regarding Possibility 1:
- Locate the PLC box in the schematic using the Go to (graphic) functionality that is provided by the popup menu of the Message management dialog.
- Insert at least one PLC connection point into the drawn PLC box.
Note:
Missing PLC connection points are determined both on schematic pages as well as on overview pages.
Regarding Possibility 2:
- Locate the PLC box in the PLC or device navigator using the Synchronize selection function offered by the popup menu in the Message management dialog.
- Create at least one PLC connection point with symbol data in the PLC or device navigator for the PLC box that is not placed yet.
If required, start a new check run.