Error message: "Communications driver missing"
Why, when setting up communication with an S7-400 do you get the message: "Communications driver missing"? You can't establish an online connection.
It is probably because the system doesn't recognize the PROFIBUS/MPI card (CP5611) on your PC. We recommend installing the CP5611 again in Settings > Control Panel.
Open the hardware manager in Windows by choosing:
- "Start > Settings > Control Panel > Add New Hardware"
The hardware wizard now opens. Then select the following button:
- "Add new device or remove problem. Choose this option if you want to add a new device to the computer or if a device is not working".
- Select the CP5611 with your cursor, click "Next" and then "Finish".
The CP5611 is now installed. Finally, in SIMATIC Manager check the settings for the PG/PC interface too.