Pictorial Usage Guide for _main_.vi. | ||||||||||||||
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click any image below to zoom ( about zoom ) | click any link above to find out more about each group | ||||||||||||||
About Zooming | ||||
Click any image with your mouse to zoom, and a full-size image ( read below for more
information on image sizing ) will display in your browser. After viewing the image,
click your browser's Back button to return to this page. It should be noted that your browser may automatically scale the zoomed image in order to fit it within the browser window. This may happen if either your browser windows is not displayed full screen size, or if you have a low resolution screen setting such as 800x600 or less. If the browser rescales the image, passing the mouse pointer over the image will usually present you with either a menu, icon, or some other option that can be used to scale the image to full size. Top of page |
load and initialize | ||||
What the images show - 1.) The _main_.vi that will be used in the examples. Note the other files that were also in the archive - of particular interest is READ_1st_LV.htm, which should be read before doing anything. If you haven't yet thoroughly read READ_1st_LV.htm, do so now, then load _main_.vi 2.) After loading _main_.vi click the continuous run button. 3.) The red LED should remain lit the entire time you are doing the excercises described in this document. 4.) Click the show initialization button. Notice that a big WAIT LED appears and a windows message box is presented, showing the current configuration that the DLL will be using. The sample application will attempt to find a M201_SP.INI in the windows directory and load the configuration from that. If the .INI file is not found, it will load default values. You must use the IniTool.exe to create the correct configuration file that will both access the correct COM port on your PC and properly use the sample application. Be sure to read READ_1st_LV.htm and create the correct M201_SP.INI configuration file if you haven't already done so. To continue, with the initialization, click the OK button in the box that shows the configuration. 5.) Once successfully initialized the LED beside the show initialization button will turn green. Top of page |
single conversion | ||||
What the images show - 1.) Select the main channel. If a multiplexer is connected, a sub-channel can also be selected. 2.) Anytime a channel is changed, the LED will flash to indicate that you must press the Set Polled Chan button. 3.) After the channel is set, the LED beside the button will turn green. 4.) Click the Get One Voltage button. Notice that a big WAIT LED appears, and the button also shows a wait message until the call to get the voltage has returned. 5.) Upon success, the voltage will be displayed in the table of channels/sub-channels. Top of page |
scanning | ||||
What the images show - 1.) Click the click to start scanning button and then wait for the big WAIT LED to turn off. 2.) Note that the click to start scanning button has changed to a click to stop scanning button which will stop the scan if clicked. 3.) The voltages will appear in the table of channels/sub-channels. note: If you followed the instructions in READ_1st_LV.htm to create the correct M201_SP.INI configuration file, the scan will display data for the channels as shown |
scanning | ||||
After initializing, you can begin scanning. If you've setup everything according to the instructions
in
READ_1st_LV.htm, pressing the
click to start scanning button should begin the scan and display the voltages
within the two boxes. You should press the click here to stop scanning
button when you wish to end the scan. Be sure to end the scan before closing the application or attempting
to use any of the other buttons on the main panel. As you may have noticed when using IniTool.exe, there is an option to cause the DLL to send the scan data either to memory where an application can read it ( as is done in this VI ), send the data to a log file, or send it to both memory and a log file. Click any image to zoom, and then your browser BACK arrow to return to this page. Top of page |
read a single voltage | ||||
Once initialized, and while not scanning, the M201 is considered to be in polled mode where
you can perform any I/O operation as well as read a single voltage at any time. Click any image to zoom, and then your browser BACK arrow to return to this page. Top of page |