Microsoft UNO-3074 user manual LED and Buzzer for System Diagnosis, Power Register Bit Map

Table 2.18: Power Register Bit Map

218H R

Power Register

PWR P2 P1

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-3074 offers a programmable LED indicator (Fig- ure 2.13) and buzzer. They can be programmed to show a systems status by LED indicator flickering and buzzer alarm.

Figure 2.13: LED Location for System Diagnosis

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