Siemens SINAMICS G120C Operating Instructions Manual page 342

Alarms, faults and system messages
9.1 Operating states indicated on LEDs
LED BF display for CANopen
In addition to the signal states "on" and "off" there are three different flashing frequencies:
Table 9- 6
GREEN - single
RED - single flash
RED - double flash
YELLOW - variable
338
Communication diagnostics via CANopen
LED
BF
GREEN - on Not relevant
GREEN - fast
flash
RED - on
RED - slow RED - slow
RED - fast RED - fast
RED - on
frequency
Explanation
RDY
Data is being exchanged between the inverter and con-
trol ("Operational")
Bus state "Pre-Operational"
Bus state "Stopped"
No bus
Alarm - limit reached
Error event in control (Error Control Event)
Inverter waits until the power supply is switched off and
switched on again after a firmware update
Incorrect memory card or unsuccessful firmware update
Firmware update in progress
Operating Instructions, 07/2015, FW V4.7 SP3, A5E34263257B AC
SINAMICS G120C converter