Response of the LEDs in operation
LED Color State Description / cause Remedy
RDY
(READY)
- Off Electronics power supply is missing or outside
permissible tolerance range.
Check the power sup‐
ply
Green
Continuous light The unit is ready for operation.
Cyclic DRIVE-CLiQ communication is in progress.
-
Flashing light 0.5
Hz
Commissioning/reset -
Flashing light 2 Hz Writing to the memory card. -
Red Flashing light
2 Hz
General error Check parameter as‐
signment/configuration
Red/green Flashing light
0.5 Hz
The Control Unit is ready for operation, but there
are no software licenses.
Install the missing li‐
censes.
Orange
Flashing light
0.5 Hz
Updating the firmware of the DRIVE-CLiQ com‐
ponents.
-
Flashing light
2 Hz
DRIVE-CLiQ component firmware update com‐
pleted. Waiting for POWER ON of the correspond‐
ing component.
Switch on the compo‐
nent.
Green/Or‐
ange
or
Red/Or‐
ange
Flashing light
2 Hz
Recognition of the component via LED is activa‐
ted (see SINAMICS S120/S150 List Manual.)
Note:
Both options depend on the LED status when
component recognition is activated.
-
COM - Off Cyclic communication has not (yet) taken place.
Note:
PROFIdrive is ready for communication when the
Control Unit is ready (see LED: RDY).
-
Green
Continuous light Cyclic communication is taking place. -
Flashing light
0.5 Hz
Full cyclic communication is not yet taking place.
Possible causes:
● The controller is not transferring any setpoints.
● During isochronous operation, no GC (Global
Control) or a faulty GC is transferred by the
controller.
-
Red
Flashing light
0.5 Hz
The PROFIBUS master is sending a faulty param‐
eter assignment or the configuration file is corrup‐
ted.
Modify the configura‐
tion between master/
controller and Control
Unit.
Flashing light
2 Hz
Cyclic bus communication has been interrupted
or could not be established.
Rectify the bus com‐
munication fault.
MOD - Off - -
OUT > 5 V - Off - -
Orange Continuous light The voltage of the electronics power supply for
the measuring system is 24 V.
1)
1)
Make sure that the encoder connected is designed for a 24 V supply. Connecting a 5 V encoder to a 24 V supply can
destroy the encoder electronics.
Service cases - hardware
4.9 Control Unit CU320-2 PN and CU310-2 PN
Software and hardware
Service Manual, 08/2018, 6FC5397-5DP40-6BA1 131
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