Description of the device
4.7 LED display
SCALANCE XM-400
Operating Instructions, 09/2018, C79000-G8976-C306-08
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The "RM" LED indicates whether or not the device is a redundancy manager and whether or
not the ring is operating free of error.
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
With a redundant linking of rings, the "SB" LED shows the status of the redundant
connection. The available options of a redundant link are as follows:
● Standby Function
● MRP Interconnection
The standby function is disabled.
Green On The standby function is enabled. The standby section is pas-
The standby function is enabled. The standby section is active.
MRP Interconnection is disabled.
MRP Interconnection redundancy is available.
MRP Interconnection redundancy is not available.