VXI VM4016 user manual Application Examples

VXI Technology, Inc.

APPLICATION EXAMPLES

This section contains examples of using SCPI command strings for programming the VM4016 module. The code is functional and will contain a brief description about the operation.

Example 1

In this example, the VM4016 sets the output interrupt polarity on the front panel and the debounce time period for the digital debounce circuitry.

OUTPut:POLarity:EXTernal:INTerrupt NORM	Sets the external interrupt output polarity to
	high pulse when an interrupt occurs.
INPut:DEBounce 25e-6	Sets input debounce time for all channels to
	25 ∝s. This will not allow a signal to
	generate an interrupt unless the channel is
	active for greater than 25 ∝s.

Example 2

In this example, the VM4016 enables or disables the specified channels for interrupt generation, sets the offset, polarity and voltage range. It returns the value of First Latched register which records the first input channel to cross its threshold and queries the current state of inputs.

INP:MASK 1,(@1,2)	Enables Channels 1 and 2 for interrupt
	generation.
INP:MASK 0,(@3:16)	Disables Channels 3 through 16 from
	generating an interrupt.
INP:RANG 10,(@1,2)	Selects ±10 volts as the input range for
	Channel 1 and 2.
INP:OFFS +5.25,(@1,2)	Selects +5.25 volts as the offset voltage for
	Channels 1 and 2.
INP:POL NORM,(@1,2)	Selects both Channel 1 and 2 to generate an
	interrupt when Channels 1 and 2 are
	greater than the offset voltage.
FETC:LATC?	Returns the active signal in the First
	Latched Register.
FETC:RAW?	Returns the State of unconditioned
65535
	(ummasked and non-inverted) inputs.
FETC:COND?	Returns the state of masked and inverted
3
	inputs.

34 VM4016 Programming