VXI VM4016 user manual Single Channel Operation, Commands Description

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SINGLE CHANNEL OPERATION

This example is for controlling a device that can tolerate a maximum input voltage level at +35 VDC for a maximum time of 250 ms before damage will occur. The input power to this device is provided from a remote source that can be disabled. A low signal applied to the power source remote inhibit will disable its output. The controller will then be notified that an out-of- tolerance condition has occurred and the device was shut down.

The following code is for monitoring a single input for voltage level that exceeds +35VDC for longer than 250 ms. A low latched output is required to be generated upon detection of the interrupt that is used to inhibit the remote power source.

COMMANDS	DESCRIPTION
INP:RANG 100,(@1)	Selects ±100 volts as the input range for Channel 1.
INP:DEB 0.25	Sets the debounce time limit to 250 ms.
INP:MASK 1,(@1)	Enables Channel 1 to generate an interrupt.
INP:MASK 0,(@2:16)	Disables Channels 2 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:OFFS +3.5,(@1)	Selects +35.0 volts as the offset (reference) voltage.
OUTP:POL:EXT:LATC INV	Sets the external latched output to be active low.

Figure 3-1and the explanation that follows illustrates what is occurring during this example.

VM4016 Programming 35