FL SWITCH MM HS
1-12
PHOENIX CONTACT
6874_en_16
1.3
Status and diagnostic indicators
1.3.1
LEDs on the switch and the MMS extension module
Des.
Color
Status
Meaning
US1
Green
ON
Supply voltage 1 in the tolerance range
OFF
Supply voltage 1 too low
US2
Green
ON
Supply voltage 2 in the tolerance range
OFF
Supply voltage 2 too low
FAIL
Red
ON
Alarm contact open, i.e., an error has occurred
OFF
Alarm contact closed, i.e., an error has not occurred
A Link LED is located above the interface module slot for each port
LNK
(Link)
Green
ON
Link active
OFF
Link inactive
A second LED is provided above the interface module slot for each port on the MMS and on the front of the housing on the
MCS. The function of the second LED (MODE) for each port can be set using a switch on the device, which controls all ports
(see also example below). There are three options:
ACT
(Activity)
Green
ON
Sending/receiving telegrams
OFF
Not sending/receiving telegrams
100
Green
ON
100 Mbps
OFF
10 Mbps if Link LED is active
FD
(Duplex)
Green
ON
Full duplex
OFF
Half duplex if Link LED is active
ACT and 100 and FD
simultaneously
Green
Flashing
PROFINET device identification
ACT or 100 or FD
(selected by mode
switch)
Green
Flashing
No IP parameter present following restart
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