Description of the device
2.2 The LEDs
SCALANCE X-200
18 Operating Instructions, 03/2015, C79000-G8976-C284-06
Fault LED "F" (yellow/red LED)
The fault LED indicates a fault/error on the X-200. If the X-200 detects an error, the signaling
contact is opened at the same time assuming that the response of the signaling contact was
not configured differently.
The meanings of the fault LED display are as follows:
Yellow Lit The LED can only adopt this status with FM devices.
Check the received power or the loss of power on optical connections. If necessary,
Red Lit The fault LED lighting up can have the following meanings:
• Link down event on a monitored port
• Loss of the power supply
• C-PLUG error
• Device is in PROFINET mode:
– There is no connection to the controller.
– There is a connection to the controller. A configured diagnostics interrupt is
also pending, for example power fail interrupt, C-PLUG interrupt etc.
• Redundancy manager connected through
• Switchover of standby connection
• A defined value was undershot in a monitored optical connection.
• A loop was detected.
• Device startup. The LED lights up for approximately 20 seconds.
Red Flashing Internal error detected. Notify maintenance personnel. If necessary, send the device
Redundancy manager LED "RM" (green LED)
The green LED shows the following statuses of the X-200:
Green Lit The device is operating in the role of redundancy manager. The ring is operating free
of errors. The monitoring is enabled.
Green Flashing The device is operating in the role of redundancy manager. An interruption was de-
tected in the ring. The device has switched through.
The device is not operating in the role of redundancy manager.
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