Rockwell Automation 1772-AF3,D17726.5.2 User Manual AUX FUNCT PROM - Manual (Page 21)

File Diagnostic Instruction
Chapter 4
4Ć4
Load data into the five word file associated with the data address as follows.
Data Address - The data address is the first address that you entered into the
instruction block. The data address is the first of five consecutive addresses into
which you load the following data (Figure 4.5).
First address - length of both files to be searched (they are equal), three digit,
000-999
Second address - Address of the file of actual values, lower three digits
Third address - Address of the file of actual values, upper three digits
Fourth address - Address of the file of reference values, lower three digits
Fifth address - Address of the file of reference values, upper three digits
Figure 4.5
Example UserĆEntered Data (BCD)
Word
Location
0500
0501
0502
0503
Bit Location
17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00
Not Used 0 1 0
File Length = 10
(BCD)
Available for
Bit Storage
5 2 3
0 0 0
Address of actual value
file, lower 3 digits
upper 3 digits tal
Address of reference
Description
5 0 5
0 0 0 0504
file, lower 3 digits
upper 3 digits
Data Address File and Reference File - You can assign these files to any
usable storage location in the data table. For convenience of loading data, assign
the 5-word file of the data address and your reference file to consecutive
addresses (0500-0516 in Figure 4.6) because you will load data into both files.
Load the reference file with values which represent correct operation for each
step in your sequential application.
File of Actual Values - You can assign this file to any usable storage location in
the data table. You may want to assign this file to addresses in the I/O image
tables or to some other file into which your program moves actual or application
values (0523-0534 in Figure 4.6)