DART Controls DM8000 CONTROL SERIES Instruction Manual page 16

Parameter 23 – Signal Input 1 (S1) Recovery Rate
This is the rate at which the display will attempt to recover once the pulse train appears to have
stopped. The recovery rate is the number of half seconds which the unit will wait before dividing
(Rate Mode) or multiplying (Time Mode) the display value by 2 in an attempt to accurately
represent the current speed or time. In the absence of input pulses, this will continue at regular
intervals until either 0 (Rate Mode) or 99:99 (Time Mode) is reached. Setting this parameter to
0 will disable the automatic recovery feature. If this parameter is set too low for the application,
the division or multiplication may prematurely occur causing the reading to read too high, too
low, or unstable. This can easily be corrected by simply increasing this parameter's value or
disabling it by setting it to zero. Note: When in Count Mode, this parameter needs to be set
to zero.
Parameter 24 – Signal Input 1 (S1) Display Smoothing / Averaging
This is the amount of time, in 1-second increments, which will be averaged before updating the
display. Setting this parameter to 0 will disable the averaging feature.
Parameter 25 – Signal Input 1 (S1) Decimal Point (DP) Position
This selects the format of the display with respect to the decimal point's position. This parameter
does not effect the value entry for other parameters. For example, it the user desires to display
10.00 at an input of 300RPM, then parameter 20 would be set to 1000, parameter 21 would
be set to 300, and parameter 25 would be set to 2.
Mode 0: Fixed XXXX
Mode 1: Fixed X.XXX
Mode 2: Fixed XX.XX
Mode 3: Fixed XXX.X
Mode 4: Fixed XXXX.
Parameter 26 – Signal Input 1 (S1) Auto-Ranging Confi guration
This selects how the unit auto-ranges and formats the numbers for the display.
Mode 0: Auto-Ranging Disabled
The auto-ranging mode is disabled. Ignoring decimal points, this limits the units display
range from 0 to 9999. Values beyond this range will display as an overfl ow error (-OF-).
Mode 1: Auto-Ranging On Overfl ow Only
In this mode, auto-ranging will only be activated if the display value exceeds the maximum
native display value. For example, in XX.XX decimal point mode, 99.99 would be the
maximum native value for a 4-digit display. When the display is in overfl ow, it will display
only the 4 most signifi cant digits and the decimal point will fl ash.
Mode 2: Auto-Ranging Always Active
In this mode, auto-ranging is always active and continuously attempts to display the 4 most
signifi cant digits. For example, the display will automatically range from 0.001 to 9999 as
needed. In this mode, any value over 9999 will be displayed as an overfl ow error (-OF-).
Parameter 27 – Counter Reset / Preset Value
This is the value that will automatically be loaded into the display after the counter has been
reset. See Counter Reset Confi guration, parameter 16, for more details.
Parameter 30 – Signal Input 2 (S2) Display Reference
This is the number to be displayed when at the user-specifi ed motor Reference RPM. In Rate
Mode, this value represents the numerator of the rate unit such as feet, ounces, or revolutions.
In Time Mode, this value represents the reference time measured in seconds or minutes. If the
desired display is HH:MM, then all values should be entered in minutes. If MM:SS is desired,
then all values should be entered in seconds. In Counter Modes, this value is the reference
count ratio which corresponds to the number of counts which equate to the specifi ed number
of reference pulses, parameter 21.
Parameter 31 – Signal Input 2 (S2) Reference RPM (Reference Pulses in Counter Modes)
This is the reference RPM at which the Display Reference value should be displayed. In Rate
and Time Modes, this value represents the RPM of the encoder to which the Display Reference
corresponds. In Counter Modes, this value is the Reference Pulses which correspond to the
specifi ed number of displayed counter, parameter 21. See applications for examples.
See applications for examples.
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