Siemens PPU 26x.3 series Manual page 230

Connectable components
7.9 NX10.3 / NX15.3
LEDs for status display
The following status displays on the NX modules provide information about its state:
LEDs Color
RDY Off
Green
Red
Yellow
DP Off
Green
Red
RESET button
The RESET button is on the front of the module under the cover.
Note
When the pushbutton is actuated, the locally connected drive systems are brought to a
standstill with no feedback to the control. In other words, the drive and control run
asynchronously once the drive has been successfully powered up.
230
Status Description
Electronic power supply outside permissible tolerance range
Continuous light The NX10.3 / NX15.3 is ready.
Flashing 2 Hz Writing to CompactFlash card
Continuous light The NX10.3 / NX15.3 is presently powering up and at least one fault
is active (e.g. RESET, watchdog monitoring, basic system fault).
Flashing 0.5 Hz Boot error (e.g. firmware cannot be loaded into the RAM)
Continuous light Firmware is being loaded into the RAM.
Flashing 0.5 Hz Firmware cannot be loaded into the RAM.
Flashing 2 Hz Firmware CRC fault
Electronics power supply outside permissible tolerance range: The
NX10.3 / NX15.3 is not ready.
Continuous light CU_LINK is ready for communication and cyclic communication is
running.
Flashing 0.5 Hz CU_LINK is ready for communication and cyclic communication is not
running.
Continuous light At least one CU_LINK fault is present.
CU_LINK is not ready for operation (e.g. after switching on).
PPU and components
Manual, 10/2015, 6FC5397-2DP40-5BA3