Siemens SINAMICS S120 Manual page 354

Diagnostics
7.3 LEDs on the CU320-2 PN Control Unit
Behavior of the LEDs after booting
Table 7- 6 Control Unit CU320-2 PN – Description of the LEDs after booting
LED Color
RDY (READY) -
Green
Red
Red/
green
Orange
Green/
orange
or
red/
orange
DP –
PROFIdrive
cyclic
operation
Green
352
State
OFF The electronics power supply is missing or lies
outside the permissible tolerance range.
Steady light The component is ready for operation and cyclic
DRIVE-CLiQ communication is taking place.
Flashing Commissioning / reset
light
0.5 Hz
Flashing Writing to CompactFlash card
light
2 Hz
Flashing General errors
light
2 Hz
Flashing Control unit is ready for operation.
light However, there are no software licenses.
0.5 Hz
Flashing Updating the firmware of the connected DRIVE-
light CLiQ components
0.5 Hz
Flashing DRIVE-CLiQ component firmware update has
light been completed. Wait for POWER ON of the
2 Hz respective component.
Flashing Component detection via LED is activated
light (p0124[0]).
1 Hz
Note:
Both options depend on the LED status when
component detection is activated via
p0124[0] = 1.
Off Cyclic communication has not (yet) taken place.
Note:
PROFIdrive is ready to communicate when the
Control Unit is ready to operate (see LED RDY).
Steady light Cyclic communication is taking place.
Flashing Full cyclic communication has not yet taken
light place.
0.5 Hz
Possible causes:
The controller is not transferring any

setpoints.
During isochronous operation, no global

control (GC) or a faulty global control (GC) is
transferred by the controller.
"Shared Device" is selected (p8929 = 2) and

only one controller is connected.
Description, cause Remedy
Check power supply
–
–
–
Check parameterization /
configuration data
Upgrade licenses
–
Carry out POWER ON for
the components in question
–
–
–
–
Cabinet Modules
Manual, 03/2013, A5E03263538A