Siemens SIMATIC NET SCALANCE MUM856-1 Operating Instructions Manual page 25

LED
P1
Q
DI
DO
SCALANCE MUM856-1
Operating Instructions, 02/2023, C79000-G8976-C628-05
Status Meaning
OFF There is no connection over the Ethernet interface P1.
Green There is a connection over the Ethernet interface P1 (link).
Flashing Data transfer over the Ethernet interface P1
green and
yellow
OFF No reception or mobile wireless disabled
Red Wrong PIN number or SIM card error
Flashing red Signal strength very poor
Flashing yel‐ Signal strength poor
low
On Signal strength medium
Flashing Signal strength good
green
Green Signal strength very good
OFF Digital input inactive
Green Digital input active
OFF Digital output inactive
Green Digital output active
Description of the device
3.6 LED display
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