Siemens SCALANCE XR-300M Compact Operating Instructions page 23

The "F" LED for the fault status
The "F" LED (fault) provides information on the error/fault status of the device. While the device
is starting up, this LED has the following meaning:
LED color
-
red
red
During normal operation, the "F" LED provides the following information:
LED color
-
red
The "DM" LED for the display mode
The "DM" LED (Display Mode) indicates which of the four display modes A, B, C or D is
currently active. The meaning of the L1, L2 and P1, P2, ... LEDs depends on the display mode.
LED color
-
green
orange
yellow/orange
Selecting the display mode
Press the SELECT/SET button to set the required display mode. If the SELECT/SET button is
not pressed for longer than a minute, the device automatically changes to display mode A.
Pressing the SELECT/SET button
starting at display mode A
-
Press once
Press twice
Press 3 times
The "L1" and "L2" or "L" LEDs for the power supply
Whereas on other devices, the "L1" and "L2" LEDs indicate information about the power, on the
SCALANCE X306-1LD FE, this is done by the "L" LED. A redundant power supply for this
device can be recognized by the color of the LED.
SCALANCE XR-300M
Compact Operating Instructions, 11/2019, A5E02661171-15
LED status Meaning during the device startup
off Device startup completed successfully.
on Device startup not yet completed or a fault/error has occurred.
flashes Bad firmware image.
LED status Meaning during operation
off No operating problems.
on The device has detected an error. The signaling contact opens.
LED status
off
on
on
flashes
Status of the "DM" LED
off
lit green
lit orange
flashes yellow/orange
Device description
4.3 LED display
Meaning
Display mode A
Display mode B
Display mode C
Display mode D
Display mode
Display mode A (default mode)
Display mode B
Display mode C
Display mode D
23