I am trying to communicate drive with S7-200 PLC on USS. Earlier with same PLC logic successfully completed USS communication with Micromaster drive. Now with this Drive done all setting and connection as specified in manual but still BF led is blinking. IN plc logic status it is showing error: "No communications: the drive is not ACTIVE.". Kindly suggest for the possibilities due to which error is occuring.

I have searched for examples of S7200 with G120 but could not get any application example. secondly BF led is blinking, even done after all connections and parameterization. So i wanted to know what may be the possible reasons for this???