Siemens CU240B-2 - Page 403

Alarms, faults and system messages
9.1 Operating states indicated on LEDs
Converter with the CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
403
Table 9- 4 Communication diagnostics via RS485
LED
Explanation
BF
RDY
off Not relevant Data exchange between the inverter and control system
is active
RED - slow RED - slow Inverter waits until the power supply is switched off and
switched on again after a firmware update
All other states The bus is active, however the inverter is not receiving
any process data
RED - fast RED - fast Incorrect parameterization, incorrect memory card or
firmware update unsuccessful
All other states
No bus connection available
YELLOW - variable
frequency
RED - on Firmware update in progress
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 Communication diagnostics via PROFIBUS DP
LED
Explanation
BF
RDY
GREEN - on Not relevant Data exchange between the inverter and control system is
active
off
PROFIBUS interface is not being used.
RED - slow RED - slow Inverter waits until the power supply is switched off and
switched on again after a firmware update
All other states
Bus fault - configuration fault
RED - fast
RED - fast
Incorrect memory card or unsuccessful firmware update
All other states Bus error
- no data exchange
- inverter searches for baud rate
- no connection
YELLOW - variable
frequency
RED - on Firmware update in progress