Siemens ESM

Interfaces, Displays and Operator Controls
Industrial Ethernet OSM/ESM
58
C79000-Z8976-C068-10
4.2.3 Port LEDs
The port LEDs indicate the operating states of the individual ports of the
OSM/ESM. On the OSM/ESM variants with digital inputs, the state of the inputs is
also indicated by the port LEDs. To allow this, the OSMs/ESMs have an additional
display mode. The display mode of the port LEDs can be changed using the
Select/Set button on the front panel of the OSM/ESM allowing all operating states
to be displayed. The current display mode is signaled by the display mode LEDs.
Display mode Meaning
Port Status
Note
LED 3 exists only on devices with digital
inputs.
Port LED
- Not lit: No valid connection to the port
(for example station turned off or cable
not connected)
- Lit green: Valid connection
- Flashes green (once per period): Port
switched to standby
- Flashes green (twice per period): Port is
segmented
- Flashes green (three times per period):
Port is turned off
- Flashes green (four times per period):
Port is mirrored
- Flashes/lit yellow: Data reception on this
port
100 Mbps
Note
LED 3 exists only on devices with digital
inputs.
Port LED
- Lit green: Port operating at 100 Mbps
- Not lit: Port operating at 10 Mbps
Display
Display
LED off LED off
LED off
LED off LED on
LED off
32 1
3
2
1