Description of the device
2.4 LED display
SCALANCE M874, M876
Operating Instructions, 08/2018, C79000-G8976-C331-08
27
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.
P1
P2
P3
P4
OFF
Ethernet connection to local computer or LAN not established
ON
Ethernet connection to local computer or LAN established
ON
Device receiving / sending data
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