Check list

Is the firmware of the Hilscher driver set at least V01.057 or newer?
Did you check the connection, e.g. with the communication tool "SyCon"?
Did you select the CIF card (Board NR) correctly? Both on the PC and under CE, you can use the Cif driver test software, which allows you to test the board settings and to check the firmware version.
Did you define the variables correctly? The net address in the variable configuration matches the MPI address of the connected PLC(s).
Are the used datablocks defined correctly in the PLC? All variables addressed in zenon must exist on the PLC!
Have you analyzed the "driver communication error file" (which errors have occured)?

In case of communication problems, the driver writes a detailed problem analysis into the driver communication error file. This file is stored in the project directory (RT\\FILES\\zenOn\\custom\\log). The name of the file is _<drivername>.TXT.
The file can be opened with any text editor, e.g. Notepad.

For additional error analyses, please send a project backup and the "error file" to the support team responsible for you.