Description of the device
3.4 LED display
SCALANCE M804PB
Operating Instructions, 07/2018, C79000-G8976-C496-01
23
LED
Status
Meaning
L
OFF
The device is turned off, no operating voltage.
ON
The device is turned on, operating voltage is present.
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
OFF
There is no Ethernet connection to the local computer or LAN.
ON
The Ethernet connection to the local computer or LAN has been estab-
lished.
ON
The device is receiving / sending data.
MPI
OFF
There is no MPI/PROFIBUS connection.
ON
The MPI/PROFIBUS connection has been established.
DI
OFF
The digital input is inactive.
ON
The digital input is active.
DO
OFF
The digital output is inactive.
ON
The digital output is active.