Siemens SIMATIC NET SCALANCE XM-408-8C - LED Display; Overview; Rm Led

4.7 LED display
4.7.1 Overview
The following 󹪝gure shows the arrangement of the LEDs.
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F LED for displaying the fault/error status
RM LED for displaying the "redundancy manager" function
SB LED for display of redundantly linked rings
DM1/DM2 LEDs for displaying the display mode
L1/L2 LEDs for displaying the power supply
P LEDs for displaying the port status *)
COMBO Indicates that the LEDs belong to combo ports
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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 LED status Meaning
- O󹪜 The device is not a redundancy manager.
Green On The device is a redundancy manager.
The ring is working without problems, monitoring is activated.
Green 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
SCALANCE XM-400
Operating Instructions, 03/2021, C79000-G8976-C306-10 33