Measurement Computing DASYLab User Manual - Manual (Page 38)

DASYLab
© National Instruments Ireland Resources Limited | 3-9
By default the bar graph displays the current value. However, like the digital
meter or the analog meter, the bar graph also can display the mean value, the
root mean square, the minimum, or the maximum of the current data block.
Status Display
Use the status display to display states and not values. By default the status
display shows two states: OFF, the lamp is red, and ON, the lamp is green.
The threshold value is
1.5 . You can increase the number of states if you
display graphics instead of lamps. To do so, assign a graphic to every value
range. For example, if you have three graphics of a valve, the status display
shows a closed valve in the range
0 to 1 , a half-open valve in the range 1 to
2 , and an open valve in the range above 2 .
You also can use the status display as a bit display that converts every value
into 16 bit integer values and displays an LED for each of the 16 bits.
Selecting Input Modules
The following descriptions provide an overview of the functions of the input
instruments and help you choose the right module for a certain task.
Switch
Use the switch to output TTL signals manually during a measurement and to
enable triggers, actions, or modules that have a control input. A TTL signal
has either the value
0 or 5 . The switch types On/Off switch and Switch
output a signal with a constant value of 5 until you click the button again. The
Push button outputs the TTL signal only as long as you press this button and
the One shot switch outputs the signal after you click for the length of a data
block. If you enable several data channels in the module, you can create
several different switches side by side or on top of each other.
The switches Start/Stop and Pause/Continue are different from the other
switch types. These switches have no outputs because they affect the whole
worksheet. You can use these switches to stop or to pause a measurement and
to restart a measurement. Use these switches, for example, in the layout to
control a measurement in the full-screen mode.