Siemens ESM - Manual (Page 61)

Interfaces, Displays and Operator Controls
Industrial Ethernet OSM/ESM
C79000-Z8976-C068-10
57
Fault Mask
Display Mode
Note
LED 3 exists only on devices with digital
inputs.
With the line 1 or 2 LEDs, the fault mask
indicates whether the power supplies are
monitored with the signaling contact.
L1 or L2 LED
- Lit green; in other words the
corresponding power supply (line 1 or
line 2) is monitored. If the power supply
falls below 14 V, the signaling contact
responds.
- Not lit, in other words the corresponding
power supply (line 1 or line 2) in not
monitored. If the power supply falls below
14 V this does not trigger the signaling
contact.
The fault mask can be set again with the
button on the front panel of the OSM/ESM
(see 4.2.4.2)
The "Select/Set" button on the front panel of the OSM/ESM changes the display
mode of the display mode LEDs. Using this button, a new status can be
programmed for the fault mask (see 4.2.4.2)
LED on LED on LED off
3 2 1