Omega OMB-DAQBOARD-3000 Series User Manual page 70

DaqBoard/3000 Series boards include a setpoint configuration feature which allows the user to individually
configure up to 16 detection setpoints associated with channels within a scan group. Each detection
setpoint can be programmed in the following ways:
A digital detect signal is used to indicate when a signal condition is True or False, i.e., whether or not the
signal has met the defined criteria. The detect signals themselves can be part of the scan group and can be
measured as any other input channel; thus allowing real time data analysis during an acquisition.
Each setpoint can update the following, allowing for real time control based on acquisition data:
The detection module looks at the 16-bit data being returned on a given channel and generates another
signal for each channel with a setpoint applied: Detect1 for Channel 1, Detect2 for Channel 2, etc. These
signals serve as data markers for each channel's data. It doesn't matter whether that data is volts, counts,
period, pulsewidth, timing, or encoder position.
A channel's detect signal will show a rising edge and will be True when the channel's data meets the
setpoint criteria. The detect signal will show a falling edge and will be False when the channel's data does
not meet the setpoint criteria.
The detect signal has the timing resolution of the scan period as seen in the diagram below. The detect
signal can change no faster than the scan frequency (1/scan period.)
Each channel in the scan group can have one detection setpoint. There can be no more than 16 setpoints,
in total, applied to channels within a scan group.
Detection setpoints act on 16-bit data only. Since the DaqBoard/3000 Series boards have 32-bit counters,
data is returned 16-bits at a time. The lower word, the higher word or both lower and higher words can be
part of the scan group. Each counter input channel can have 1 detection setpoint for the counter's lower
16-bit value and 1 detection setpoint for the counter's higher 16-bit value.
6-2 Setpoint Configuration for Output Control
Single Point referenced – above, below, or equal to the defined setpoint
o
o Window (dual point) referenced – inside, or outside the window
o Window (dual point) referenced, Hysterisis Mode – outside the window high forces
Output 1; outside the window low forces Output 2
P2C digital output port with a data byte and mask byte
o
analog outputs (DACs)
o
timers
o
Example Diagram of Detection Signals for Channels 1, 2, and 3
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DaqBoard/3000 Series User's Manual