Rockwell Automation Publication 1766-UM001O-EN-P - September 2021 89
Chapter 5 LCD and Keypad
10. Now, we will view an example of the data value of a protected property. If
LCD Edit Disable is set to checked (enable), the “Protected!” message
displays and this data file cannot be edited by the LCD.
11. Try to move the cursor to the data value position by pressing OK. Because
the N7:0 word is protected, the cursor does not move to the data value
position.
12. If you have finished monitoring the integer file N7, press ESC to return
to the Main Menu screen, as shown in step 2
.
Monitor Double Integer files
The LCD allows you to view and change the data value of a double integer file.
You can access to this functionality using the Monitoring screen of the LCD.
To monitor a double integer file on the LCD, you have to specify its file number
in the Target User Defined File Number (TUF) element of the LCD Function
File and download your application program to the controller. The TUF
element can only be changed by a program download.
The value stored in the TUF element identifies the double integer file with
which the LCD interfaces. Valid double integer files are L9, and L10…L255.
When the LCD reads a valid double integer file number, it can access up to 256
words (0…255) on the LCD screen. The protection bit (LCD edit disable) in the
data file properties of target integer file are used to define the read-only or
read/write privileges for its file.
Valid file type include Bit, Integer, Double integer or Float, as specified in the
TUF element.
IMPORTANT The maximum range of words you can monitor with the Integer File
Monitoring functionality on the LCD is the first 256 words (0…255) of the
target integer file.
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