Table 4-8 Meaning of the OPT LED on the Control Unit
LED Color Status Description, cause Remedy
OPT – OFF The electronics power supply is missing or outside the per‐
missible tolerance range.
CBE20 either defective or not inserted.
–
Green Continu‐
ous light
CBE20 is ready and cyclic communication is taking place. –
Flashing
light
0.5 Hz
CBE20 is ready but cyclic communication is not running.
Possible causes:
● Communication is being established.
● At least one fault is present.
–
Red Continu‐
ous light
Cyclic communication via PROFINET has not yet been es‐
tablished. However, non-cyclic communications are possible.
SINAMICS is waiting for a parameterization/configuration
telegram.
–
Flashing
light
0.5 Hz
The firmware update into the CBE20 has been completed with
an error.
Possible causes:
● The memory card for the control unit is defective.
● The CBE20 is defective.
In this state CBE20 cannot be used.
Replace the memory
card or the CBE20.
Flashing
light
2 Hz
There is a communications error between the Control Unit
and the CBE20.
Possible causes:
● The CBE20 was withdrawn after booting.
● The CBE20 is defective.
Correctly insert the
board, if required, re‐
place.
Orange Flashing
light
0.5 Hz
Firmware of the CBE20 currently being updated. –
Option Boards
4.2 Communication Board Ethernet CBE20
Supplementary component descriptions
Manual, 06/2019 53
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