Measurement Computing DaqView - Manual (Page 63)

Detection Panel
The Detection Panel, located in the center of the upper window, provides a means of selecting any one of
several detection criteria. This includes setting limit values for Limit A, and/or Limit B, as applicable. In
regard to detection criteria, the list of options is shown in the figure. Each is self-explanatory, with
exception of the special-case hysteresis mode.
In Hysterisis Mode Output 1 is forced when an outside of window “high” condition triggers it. Output 1
continues until an outside of window “low” condition is exists, at that point Output 2 is forced. The
hysteresis mode allows for updating P2C, DACs, or timers. Refer to your hardware user’s manual for
detailed information and graphic examples.
The Detection Panel
The setting of a detection window must be done with a scan period in mind. This
applies to analog inputs and counter inputs. Quickly changing analog input voltages
can step over a setpoint window if not sampled often enough.
There are three possible solutions for overcoming this problem:
(1) The scan period could be shortened to give more timing resolution on the
counter values or analog values
(2) The setpoint window can be widened by increasing Limit A and/or
lowering Limit B.
(3) A combination of both solutions (1 and 2) could be made.
Reference Note:
If your device supports setpoint configuration, refer to you hardware user’s manual for
discussions of setpoint configuration and examples.
DaqView User’s Guide 888194 The Setpoints Window 11-3