Advantech UNO-3072L, User Manual, Page: 39 / 64

31 Chapter 2
Figure 2.12: LED Indicators Location to Monitor Power Input Situation
PWR =0, Power fail
=1, Power normal
P1 (24V) =0, Power input 1 fail
=1, Power input 1 normal
P2 (24V*) =0, Power input 2 fail
=1, Power input 2 normal
2.9 LED and Buzzer for System Diagnosis
In a “headless application” (an application without a monitor display), it is
always difficult to know the system status. Another PC may be needed to
monitor a headless device's status via RS-232 or Ethernet. In order to
solve this problem, UNO-3072Loffers a programmable LED indicator (Fig-
ure 2.14) and buzzer. They can be programmed to show a systems status by
LED indicator flickering and buzzer alarm.
Table 2.18: Power Register Bit Map
218H R Power Register
PWR P2 P1