Publication 1763-UM001E-EN-P - June 2015
Using the LCD 109
2. Then, press the OK key on the LCD keypad. The I/O Status screen is
displayed, as shown below.
3. If you have finished viewing I/O status, press the ESC key to return to
the Main Menu screen, as shown in step 1.
Monitoring Bit File
The LCD allows you to view and change the data values of 48 bits in a user
defined file. You can access to this functionality via the Monitoring screen of
the LCD.
To monitor the bit file on the LCD, you have to specify its file number in the
Target Bit File Number (TBF) element of the LCD Function File and
download your application program to the controller. The TBF element can
only be changed by a program download.
Target Bit File Number (TBF)
The value stored in the TBF element identifies the bit file with which the LCD
will interface. Valid bit files are B3, and B10 through B255. When the LCD
reads a valid bit file number, it can access up to the first 48 bits (0 to 47) of the
specified file on the LCD screen. The next 48 bits in the target bit file (48 to
95) are used to define the read-only or read/write privileges for the first 48
bits.
The only bit file that the LCD interfaces with is the file specified in the TBF
element.
Feature Address Data Format Type User Program
Access
Target Bit File Number LCD:0.TBF Word (int) Control Read Only
Use your programming software to ensure that the
bit file you specify in the TBF element, as well as the
appropriate number of elements, exist in the
MicroLogix 1100 user program.
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