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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-oftolerance condition has occurred and the device was shut down.
The following code is for monitoring a single input for voltage level that exceeds +35 VDC 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.
Note:
COMMANDS
DESCRIPTION
INP:RANG 100,(@1)
Selects ±100 V as the input range for Channel 1.
INP:DEB .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.
SENS:COND:LEV +35,(@1)
Selects +35 V as the offset (reference) voltage.
OUTP:POL:EXT:LATC INV
Sets the external latched output to be active low.
The INPut:OFFSet command can be used in place of the SENSe:CONDition:LEVel command.
The INPUT:OFFSet command is normalized to the 10 V range, so, in order to have the same
+35 V offset, the command must be entered as:
INPut:OFFSet +3.5,(@1)
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VM4018 Programming