Siemens sinamics G120 Operating Instructions Manual page 405

Table 9- 4
YELLOW - variable
Communication via Modbus or USS:
If the fieldbus monitoring is deactivated with p2040 = 0, the BF-LED remains dark,
independent of the communication state.
Table 9- 5
YELLOW - variable
Converter with CU250S-2 Control Unit
Operating Instructions, 01/2016, FW V4.7 SP6, A5E31759476B AE
Communication diagnostics via RS485
LED
BF
off Not relevant
RED - slow RED - slow
All other states
RED - fast RED - fast
All other states
RED - on
frequency
Communication diagnostics via PROFIBUS DP
LED
BF
GREEN - on Not relevant
off
RED - slow RED - slow
All other states
RED - fast RED - fast
All other states
RED - on
frequency
Explanation
RDY
Data exchange between the inverter and control system
is active
Inverter waits until the power supply is switched off and
switched on again after a firmware update
The bus is active, however the inverter is not receiving
any process data
Incorrect parameterization, incorrect memory card or
firmware update unsuccessful
No bus connection available
Firmware update in progress
Explanation
RDY
Data exchange between the inverter and control system is
active
PROFIBUS interface is not being used.
Inverter waits until the power supply is switched off and
switched on again after a firmware update
Bus fault - configuration fault
Incorrect memory card or unsuccessful firmware update
Bus error
- no data exchange
- inverter searches for baud rate
- no connection
Firmware update in progress
Alarms, faults and system messages
9.1 Operating states indicated on LEDs
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