Siemens SINAMICS DCM Operating Instructions Manual page 176

Additional system components
7.1 Option Board: Communication Board Ethernet CBE20
Table 7- 4 Meaning of the OPT LED on the Control Unit
LED Color
OPT –
Green
Red
Orange
174
Status
OFF Electronics power supply is missing or outside permissible
tolerance range.
Communication Board either defective or not inserted.
Continuous Communication Board is ready and cyclic communication
light is taking place.
0.5 Hz The Communication Board is ready, but cyclic
flashing light communications is not running.
Possible causes:
At least one fault is present.

Communication is being established.

Continuous Cyclic communication via PROFINET has not yet been
light established. However, non-cyclic communication is
possible. SINAMICS waits for a parameterizing/configuring
telegram
0.5 Hz The firmware update into the CBE20 has been completed
flashing light with an error.
Possible causes:
The CBE20 is defective.

The memory card for the Control Unit is defective.

CBE20 cannot be used in this state.
2 Hz There is a communications error between the Control Unit
flashing light and the CBE20.
Possible causes:
Board was withdrawn after booting.

The board is defective

0.5 Hz Firmware is being updated.
flashing light
Description, cause
Operating Instructions, 1.2012, C98130-A7066-A1-05-7619
Remedy
–
–
–
–
–
Correctly insert the
board, if required,
replace.
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SINAMICS DCM DC Converter