WAGO-I/O-SYSTEM 750 Device Description 29750-644 Bluetooth® RF-TransceiverManualVersion 2.0.0, valid from FW/HW Version 03/034.4.3 “Real-Time Communication” Mode, SlaveTable 11: Legend for the “Display elements” figure – “Real-Time Communication” mode, slaveDesignation LED State FunctionStatusindicator A green I/O module ready for operationred I/O module note ready for operationInterference D, Hgreen > 53 channels free (no or negligibleexternal activity in the frequency range)yellow 39 … 53 uninterrupted channelsred < 39 only marked as free (massiveexternal activity in the frequency range)off There is no connection or only for a fewsecondsSignalquality C, Ggreen Signal quality optimalyellow Signal quality moderatered Signal quality lowoff There is no connection or only for a fewsecondsSignalstrength B, Fgreen Signal strength optimalyellow Signal strength highred Signal strength lowoff There is no connection or only for a fewsecondsStatus of themaster inslow 0x20Eoff Master not connectedyellow Wait for connectionyellowflashing Connection is being establishedgreen Connection establishedgreenflashing Data transferred Connection error