Rockwell Automation 1763 MicroLogix 1100 Programmable Controllers User Manual - Manual (Page 119)

Publication 1763-UM001D-EN-P - March 2011
Using the LCD 117
Press the Up key again, and you will find the target bit does not change
to “3/0”. It is because the maximum range of bits you can monitor with
the LCD is the first 48 bits (3 words) of the specified target bit file.
13. Try to press the Up and Down keys to change the target bit to another
bit. Try to change its data value using the OK, Up and Down keys.
14. If you have finished monitoring the bit file, B3, press the ESC key to
return to the Bit/Integer File Select screen, as shown in step 2 .
Monitoring Integer File The LCD allows you to view and change the data value of an integer file. You
can access to this functionality via the Monitoring screen of the LCD.
To monitor an integer file on the LCD, you have to specify its file number in
the Target Integer File Number (TIF) element of the LCD Function File and
download your application program to the controller. The TIF element can
only be changed by a program download.
Target Integer File Number (TIF)
The value stored in the TIF element identifies the integer file with which the
LCD will interface. The LCD can read or write to any valid integer file within
the controller. Valid integer files are N3 through N255. When the LCD reads a
valid integer file number, it can access up to the first 48 elements (words 0 to
47) of the specified file on the LCD screen. The next 48 bits (words 48 to 50)
are used to define the read-only or read/write privileges for the first 48
elements.
The only integer file that the LCD interfaces with is the file specified in the
TIF element.
IMPORTANT
The maximum range of bits you can monitor with
the Bit File Monitoring functionality on the LCD is
the first 48 bits (3 words).
Feature Address Data Format Type User Program
Access
Target Integer File Number LCD:0.TIF Word (int) Control Read Only
IMPORTANT
Use your programming software to ensure that the
integer file you specify in the TIF element, as well as
the appropriate number of elements, exist in the
MicroLogix 1100 user program.