Siemens Sinamics CU240D-2 DP Operating Instructions Manual page 268

Alarms, faults and system messages
8.1 Operating states indicated on LED
Table 8- 5
ACT
Table 8- 6
FO
Table 8- 7
BF
266
PROFINET fieldbus
LNK Explanation
Communication via PROFINET is error-free. Inverter and open-loop control
exchange actual data.
Communication via PROFINET has been set up.
Communication via PROFINET is not active.
PROFINET fieldbus
ACT / Explanation
LNK
Communication via PROFINET is error-free. Inverter and open-loop control
exchange actual data.
Communication via PROFINET has been set up.
Communication via PROFINET is not active.
Inverter does not receive a light wave signal. Possible causes:
Fiber optical cable or connector damaged.
•
Excessive attenuation of the fiber optic line.
•
PROFINET and PROFIBUS fieldbuses
Explanation
Data exchange between the inverter and control system is active
Fieldbus interface is not being used
The fieldbus is improperly configured.
RDY In conjunction with a synchronously flashing LED RDY:
Inverter waits until the power supply is switched off and switched on again after
a firmware update
No communication with higher-level controller
RDY In conjunction with an asynchronously flashing LED RDY:
Incorrect memory card
Firmware update failed
Firmware update is active
Converter with the control units CU240D-2
Operating Instructions, 04/2018, FW V4.9 SP10, A5E34262100B AF