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4.7
LED display
4.7.1
Overview
The following figure shows the arrangement of the LEDs.
F
RM
SB
DM1/DM2
L1/L2
P
COMBO
*
The number of port LEDs depends on the device.
)
4.7.2
"RM" LED
The "RM" LED indicates whether or not the device is a redundancy manager and whether or not
the ring is operating free of error.
LED color
-
Green
Green
SCALANCE XM-400
Operating Instructions, 03/2021, C79000-G8976-C306-10
LED for displaying the fault/error status
LED for displaying the "redundancy manager" function
LED for display of redundantly linked rings
LEDs for displaying the display mode
LEDs for displaying the power supply
LEDs for displaying the port status *)
Indicates that the LEDs belong to combo ports
LED status
Meaning
Off
The device is not a redundancy manager.
On
The device is a redundancy manager.
The ring is working without problems, monitoring is activated.
Flashing
The device is a redundancy manager.
An interruption has been detected on the ring and the device has
switched through.
Description of the device
4.7 LED display
33
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