Operation Communication on the PROFIBUS DP link is indicated by the SmartLinx LEDs. Error Status LEDs AiRanger / SITRANS LU Series, CraneRanger, InterRanger DPS 300 Green LED ON module is operational Amber LED ON data is being exchanged OFF data is not being exchanged Red LED ON no communication between bus and module / Bus error OFF normal operation EnviroRanger ERS 500, Milltronics BW500, Milltronics BW500/L, Milltronics SF500, MultiRanger 100/ 200, HydroRanger 200 Not used Operation 7ML19981AQ03 SmartLinx PROFIBUS DP – INSTRUCTION MANUAL Page 11 Online Green module is online Online Green module is online Diagnostics Off: Module is ok Red (blinking): Module is in an error state.
See the error descriptions (page 12) and use the master to solve the problem. Offline Red Module is offline and no communication is possible.