File Logic Instructions
Chapter 16
1611
Figure 16.8 shows the format of Figure 16.7 after data has been entered for
the following conditions:
COUNTER ADDR – Word 200
POSITION (set by program) – 003
FILE LENGTH – Each file has 6 steps
WORD ADDR – The Data Table word being compared with the words
in File B is located at address 400
FILE B – Starts at word 500, ends at word 505
FILE R – Starts at word 600, ends at word 605
The procedure for using the data monitor mode for data entry or monitor is
presented in Chapter 12.
Figure 16.8
WORDTOFILE
AND Example Rung
WORD TO FILE AND
COUNTER ADDR:
200
POSITION: 003
FILE LENGTH: 006
WORD ADDR:
400
FILE B: 500-505
FILE R: 600-605
200
(DN)
15
This instruction performs an OR operation on the contents of a specified
word in the data table and a word from File B. It places the result of the
operation in the corresponding word of File R (Figure 16.6).
The logic operation OR compares each bit in the word to the
corresponding bit in the File B word at the location of the contents. If
either bit is 1, a 1 is stored in the corresponding bit in the File R word. If
neither of the compared bits is 1, a 0 is stored in File R (Table 16.E).
16.2.2
WordtoFile OR
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