3.4.2 LED displays
Table 3-1 Meaning of LED states
Name Function Status Meaning
RDY Ready Red There is at least one fault (e.g. RESET, watchdog monitoring
etc.) or the NCU is booting up.
Flashing red/orange
(0.5 Hz)
Error accessing CompactFlash Card
Orange Accessing CompactFlash Card
Flashing orange (0.5 Hz) Updating the rmware of the connected DRIVE-CLiQ compo‐
nents
Flashing orange (2 Hz) Firmware update is complete for components. Wait for POW‐
ER ON for the components in question.
Green NC powered up and everything in cyclic mode
Flashing green/orange or red/
orange (1 Hz)
LED-supported recognition of connected DRIVE-CLiQ compo‐
nent is activated: (p0124[0] = 1).
RUN PLC RUN Green PLC ready to operate
STOP PLC STOP Orange PLC stopped
SU/PF PLC FORCE Red FORCE activated
SF PLC SF Red PLC group error
DP BUS1 F Red PROFIBUS group error X126
DP/MPI BUS2 F Red PROFIBUS group error X136
PN PN Fault Red PROFINET IO group error X150
SY/MT MAINT Orange
• Synchronization status (SY): No function
• Maintenance status (MT) of the NCU:
Maintenance request pending
OPT - - No function
Important LED states
• If all the LEDs are ashing, the PLC must be reset via the mode selector (move switch to
position "3" to reboot).
• While the NCU is powering up, all LEDs briey light up orange. You can carry out a detailed
diagnosis using a PG/PC and the operating software.
Additional references
• You can nd a detailed description of LED states during power-up in the "NCU Operating
System (IM7)" section of the Basesoftware and Operating Software Commissioning Manual.
• For information on drive faults and alarms, see also:
SINAMICS S120/S150 List Manual (LH1)
Description
3.4 Operator control and display elements
NCU 7x0.3B PN
28 Equipment Manual, 10/2020, 6FC5397-1EP40-6BA1
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