Internet PLC Forum
General => Technical support => Topic started by: seitech on January 18, 2004, 05:20:39 AM
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Is there an easy way to scroll through text on the 4x20 LCD? I have the HD-MMI keypad/LCD package with the T100MD-1616. My application requires scrolling through a series of menus up and down to control motor drivers.
seitech
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You will have to define your menu structure in software. There isn't a command for scrolling the text since there isn't buffer to store text that are "off the screen". If you want to display more than 4 lines, then implement a "page up" and "page down" using the function key. Use a variable to keep track of the page number and then display the corresponding text to the page.
Note that since the string A$ to Z$ an also be represented by an array $$[1] to $$[26] you may be able to store some text in the string variable and selective display them using the index n to the array $$[n].