Siemens SINAMICS S120 Device Manual page 332

Diagnostics
7.2 LEDs on the CU320-2 DP Control Unit
LED Color
OPT –
(OPTION)
Green
Red
RDY and Red
COM
RDY and Orange
OPT
332
Status
Off Electronics power supply is missing or outside
the permissible tolerance range.
Component is not ready.
Option board not installed or no associated drive
object has been created.
Continuous Option board is ready.
light
Flashing Depends on the option board used.
0.5 Hz
Flashing At least one fault is pending on this component.
2 Hz
Option board not ready (e.g., after switching on).
Flashing Bus fault – communication has been interrupted
2 Hz
Flashing Firmware update in progress for connected Op-
0.5 Hz tion Board CBE20.
Description, cause Remedy
Check power supply and/or
component
–
–
Remedy and acknowledge
fault
Eliminate the fault
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Cabinet Modules NEMA
Manual, 04/2014, A5E03586450A