Siemens SINAMICS G120 Operating Instructions Manual page 392

Low voltage inverters built-in units with cu250s-2 control units and encoder evaluation

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Table of Contents

Alarms, faults and system messages

8.1 Operating states indicated on LEDs

Communication via Modbus or USS:

If the fieldbus monitoring is deactivated with p2040 = 0, the BF-LED remains dark, independent

of the communication state.

Description of the LED symbols for CANopen

Fieldbuses via RS 485 interface

Data exchange between the inverter and control system is active

The fieldbus is active, however, the inverter is not receiving any process data

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

When LED RDY flashes simultaneously:

Incorrect memory card

Firmware update failed

Firmware update is active

LED is bright

LED flashes slowly

LED flashes quickly

LED flashes in the "single flash" mode

LED flashes in the "double flash" mode

LED flashes with variable frequency

Converter with the CU250S-2 Control Units

Operating Instructions, 04/2018, FW V4.7 SP10, A5E31759476B AG