Measurement Computing DaqView - Manual (Page 64)

Output Panel
The Output Panel, located at the right edge of the window, provides a choice of several output options, i.e.,
a DAC channel, Timer channel, or P2 Port C digital channel. Aside from these choices, the user can select
“None,” should no output be desired.
In addition to selecting the Output Channel, this panel provides the means to enter values for Output 1 and
Output 2. It is also where the Update on Detection mode is selected.
If the Update on Detection mode is to be used enter the desired output values. Output 1, alone, applies
when On True Only is the update mode. Both Output 1 and Output 2 apply when the update mode is
selected to On True and False.
Note
: When “None” is selected as the Output channel the output fields and the update section of the
window will be hidden, as neither will apply.
The Output Panel
The output panel includes a selection option for the “Update on Detection” mode. It can be set to:
(a) True Only: this initiates an update when the criteria is met, and thus occurs on the detection
signal’s rising edge only
(b) True and False: this initiates an update on the detection signal’s rising and falling edges. When
this option is chosen we see one output when the criteria is met (True) and a different output
when the criteria is false.
(c) Alternatively, you can choose not to update by selecting “None” from the Output Panel’s
channel pull-down list.
By software default, P2 Port C comes up as a digital input. If you want the P2 Port C
signal to be a digital output [in some initial state before an acquisition is started] and
P2 Port C is to be updated by set point criterion, then you must do an asynchronous
write to P2 Port C before the acquisition is started. The initial value will only be
output if the asynchronous write to P2 Port C has been performed.
Note
: The Update on Detection section of the Output Panel will not be visible if hysterisis mode is selected
as the detection type, or if “None” is selected as the output channel.
11-4 The Setpoints Window 888194 DaqView User’s Guide