Siemens SINAMICS G120C USS/MB Operating Instructions Manual page 351

Table 8-3
SAFE
Table 8-4
LNK
Table 8-5
BF
Communication via Modbus or USS:
If the fieldbus monitoring is deactivated with p2040 = 0, the BF-LED remains dark, independent
of the communication state.
SINAMICS G120C converter
Operating Instructions, 09/2017, FW V4.7 SP9, A5E34263257B AF
Integrated safety functions
Explanation
One or more safety functions are enabled, but not active.
One or more safety functions are active and error-free.
The inverter has detected a safety function fault and initiated a stop response.
PROFINET fieldbus
Explanation
Communication via PROFINET is error-free
Device naming is active
No communication via PROFINET
Fieldbuses via RS 485 interface
Explanation
Data exchange between the inverter and control system is active
The fieldbus is active, however, the inverter is not receiving any process data
RDY When LED RDY flashes simultaneously:
Inverter waits until the power supply is switched off and switched on again after a
firmware update
No fieldbus connection is available
RDY When LED RDY flashes simultaneously:
Incorrect memory card
Firmware update failed
Firmware update is active
Alarms, faults and system messages
8.1 Operating states indicated on LEDs
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