VXI VM4016 user manual Bracketing a Voltage, Sets the external interrupt output to be active high

VXI Technology, Inc.

BRACKETING A VOLTAGE

In this example, an input voltage level will be bracketed for an over or under-voltage error condition. The input voltage of 5.0 V will be monitored for an over-voltage of 5.25 V and an under-voltage of 4.75 V. The error condition must be true for longer than 750 µs. An interrupt will be generated if either of these conditions occur. Channel 1 will use for an over-voltage and Channel 2 for an under-voltage. Channel 1 and Channel 2 positive (+) sides will be tied together externally. Channel 1 and Channel 2 negative (-) sides will be grounded. The output interrupt will not be latched but will be pulsed.

COMMANDS	DESCRIPTION
INP:RANG 10,(@1,2)	Selects ±10 Volts as the input range for Channel 1
	and 2.
INP:DEB 75e-5	Sets the debounce time limit to 750 ∝s.
INP:MASK 1,(@1,2)	Enables Channel 1or 2 to generate an interrupt.
INP:MASK 0,(@3:16)	Disables Channels 3 through 16 from generating an
	interrupt.
INP:POL NORM,(@1)	Selects Channel 1 to generate an interrupt when
	Channel 1 is greater than the offset voltage.
INP:POL INV,(@2)	Selects Channel 2 to generate an interrupt when
	Channel 2 is less than the offset voltage.
INP:OFFS +5.25,(@1)	Selects +5.25 volts as the offset (reference) voltage
	for Channel 1.
INP:OFFS +4.75,(@2)	Selects +4.75 volts as the offset (reference) voltage
	for Channel 2.
OUTP:POL:EXT:INT NORM	Sets the external interrupt output to be active high.

Figure 3-2and the explanation that follows illustrates what is occurring during this example.

38 VM4016 Programming