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4.3
LED display
The "RM" LED for the "redundancy manager" function
The "RM" LED indicates whether or not the device is operating in the role of redundancy manager
and whether or not the ring is operating error-free.
LED color
-
green
green
The "SB" LED for the standby function
This LED shows the status of the standby function.
LED color
-
green
green
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
SCALANCE X-300M
Compact Operating Instructions, 05/2023, A5E02630801-14
LED status
Meaning
off
The device is not operating in the role of "redundancy manager".
on
The device is operating in the role of redundancy manager. The ring
is working without problems, monitoring is activated.
flashes
The device is operating in the role of redundancy manager. An inter‐
ruption has been detected on the ring and the device has switched
through.
LED status
Meaning
off
The standby function is disabled.
on
The standby function is enabled. The standby section is passive.
flashes
The standby function is enabled. The standby section is active.
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.
Device description
4.3 LED display
25
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