DART Controls DM8000 CONTROL SERIES Instruction Manual page 17

Parameter 32 – Signal Input 2 (S2) Pulses per Revolution
This is the number of pulses per revolution. Value may be from 1 to 9999.
Parameter 33 – Signal Input 2 (S2) 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 34 – Signal Input 2 (S2) 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 35 – Signal Input 2 (S2) 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 36 – Signal Input 2 (S2) 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 37 – Signal Input 2 (S2) Counter Gate (Enable / Disable) Confi guration
This selects how the S2 input is utilized in single channel counter modes.
Mode 1: Disabled (Required For Up / Down Counter Mode)
The S2 input will not function as a gate control and instead will act as the second input
for dual-channel counter operation.
Mode 2: Counting Enabled When S2 Input Low (Wired To Common)
The unit will continue to count input pulses as long as the S2 is in an electrically low state
or connected to the unit's common terminal. When the S2 input goes high (+5V) or is
allowed to fl oat disconnected, the counter will be frozen at its current value.
Mode 3: Counting Enabled When S2 Input High (Not Wired To Common)
The unit will continue to count input pulses as long as the S2 is in an electrically high
(+5V) state or allowed to fl oat disconnected. When the S2 input goes low or is wired to
the unit's common, the counter will be frozen at its current value.
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