High Country Tek DVC80 - Manual (Page 37)

P/N: 021-00154, Rev. A.6 - updated for V4.7 Tools Page | 37
0ma to 22ma. On the DVC5 only 0 to +5volts is supported. Note that on the DVC5/7 0 to +10volts requires an
external voltage divider to be connected.
To identify a Universal Input to your application program, fill out the name field or use the default. Each
universal input needs at a minimum its input type and input range to be selected.
Note: The Universal Input configuration window will display certain fields while deactivating others based on the
Input Type selected.
Input Fields
For Universal Inputs, the setup process is similar to the Analog Input setup. Refer to the previous Analog Input
section of this manual for a complete description of the analog input configuration options. The main difference
between Universal and Analog inputs is the input ranges supported. Analog inputs only support 0 to +5 volt
operation.
RPM Pulse Inputs
For RPM pulse inputs, specify the RPM Limits (min and max), and the RPM Calibration parameters (min and
max). RPM Calibration values set the 0 and 100% variable return values. The RPM Limits set error variables
when these values are met or exceeded. Because 0 RPM can never be counted, the Pulse Time Out field is the
number of seconds the system will wait until the RPM variable is set to 0 by the BIOS and set the pulse time
out flag "
name .LOS". Pulses per Rev is the number of teeth on the pulse pickup device. The DVC5/7/10 can
count pulses to a total limit of 24khz or 8khz per input on average.
Counter Mode Inputs
For Counter Mode pulse inputs, setup the min and max counts under Count Limits. The output value will be a
percent of the min to max difference. The counter value may be read or set by the application. The counter is
incremented on every falling edge of the pulse input. When the count reaches the max value it remains at that
value until set to a new value by the application program.
Quadrature Inputs
Quadrature is a method of determining Speed, Direction or Position using two pulse inputs.
For a Quadrature pulse input, setup the min and max count under Count Limits. On the DVC7/10 Quadrature
mode can only be selected with Universal input #2 and will also use Universal input #3 for the second pulse
train. The DVC5 uses inputs #1 and #2. The output will be the percentage of the min to max count. The counter
value may be read or set by the application. The counter will be incremented or decremented on every rising
and falling edge of both pulse trains based upon the phase of the two inputs. Direction is determined by the
pulse count going up or down while speed is determined by the absolute value of the pulse count change as a
function of time.
The following gives the definition as well as an overview of each of the fields in the Universal Input screen not
covered in the Analog Inputs section.
Name
The name used in the bubble logic screen to access this variable and it’s associated properties.
Range: 16 Characters with no spaces. Usable characters are A-Z, a-z, 0-9, and "_".
Rules:
The first character cannot be a number.
Compiler Keywords or other names already in use are not valid names. A valid example is "Conveyor_Speed".
Input Type
Contains all the configuration selections for the universal input
Range: Analog Input, RPM Pulse Input, Counter Mode, and Quadrature Mode
Input Range
Select the range of the input voltage or current for Analog and Pulse Inputs
Range: 0 volts to 5 volts, Volts to 10 Volts, -1 volt to 1 Volt, and 0 milliamps to 20 milliamps
Pulses Per Rev
The amount of pulses the processor will detect in one revolution
Range: 1 to 9999