Description of the device
1.3 LED display
SCALANCE M874, M876
Operating Instructions, 06/2015, C79000-G8976-C331-05
15
F OFF
No fault/error.
ON
The device is starting up or an error has occurred.
Possible errors/faults:
• Wrong PIN number
Flashing
The bootloader waits in this state for a new firmware file that you can
download using TFTP.
L
OFF
Device turned off, no power supply.
ON
Device turned on, power supply present.
SC
OFF
SIM card OK, no connection.
ON
Wrong PIN number / SIM card error
ON
Connection established
Q OFF
No reception
Signal strength: < -109 dBm
Flashing
Signal strength bad: -89 dBm to -109 dBm
On
Signal strength medium: -73 dBm to -89 dBm
ON
Signal strength good: > -73 dBm
OFF
No VPN connection is established.
ON
All configured VPN connections are established.
Flashing
Only some of the configured VPN connections are established.
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