Siemens SINAMICS S120 Manual page 357

LED Color
OPT on the
–
Control Unit
Green
Red
Orange
Cabinet Modules
Manual, 03/2013, A5E03263538A
Status
Off The electronics power supply is missing or outside the permissible
tolerance range.
Communication Board either defective or not inserted.
Steady light Communication Board is ready and cyclic communication is taking place.
Flashing light The Communication Board is ready, but cyclic communication is not yet
0.5 Hz taking place.
Possible causes:
At least one fault is present.

Communication is being established.

Steady light Cyclic communication via PROFINET has not yet been established.
However, acyclic communication is possible. SINAMICS waits for a
parameterizing/configuration telegram
Flashing light The firmware has not been successfully downloaded to the CBE20
0.5 Hz (error).
Possible causes:
The CBE20 is defective.

The memory card for the Control Unit is defective.

In this state CBE20 cannot be used.
Flashing light Communication between the Control Unit and CBE20 is faulty.
2.5 Hz
Possible causes:
The board was withdrawn after power up.

The board is defective.

Flashing light Firmware is being downloaded.
2.5 Hz
7.4 LEDs on the CBE20 Communication Board
Description
Diagnostics
355