"BF" LED

The "BF" LED indicates communication errors on the PROFIBUS interface.

Measure

Off

Error-free operating state.

The device is exchanging data with the PROFIBUS master (data exchange state).

–

Red

Illuminated

  • PROFIBUS master not in operation.
  • The connection to the PROFIBUS master has failed.
  • The device does not detect a PROFIBUS baud rate.
  • Bus communication has been interrupted.
  • Check the PROFIBUS connection of the device.
  • Check all the cables in the PROFIBUS network.
  • Check the configuration of the PROFIBUS master.

Red

Flashing with 2 Hz

  • The device detects the PROFIBUS baud rate but is not addressed by the PROFIBUS master.
  • The device was not configured or was configured incorrectly in the PROFIBUS master.
  • Check the PROFIBUS address set in the device and in the engineering tool of the PROFIBUS master.
  • Check the configuration of the PROFIBUS master.
  • Check whether you are using the appropriate device description file ().