Rockwell Automation 5370-OCR2 PAK - Manual (Page 35)

Chapter 4
OCR Tool Configuration
4–16
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OCV compares the entered match string against inspected strings. When
a printed character correlates with two or more (but not more than 4)
taught characters, the corresponding character from the match string will
be inserted into the result string. In OCV mode, the inspected string will
pass if it matches the user defined match string and will fail otherwise.
If a printed character correlates with more than 4 taught characters, a
confusion character ”?” is inserted into the result string. The presence of
a confusion character may not prevent a match, depending upon the use of
metacharacters. Refer to page 6–3 for metacharacter descriptions.
6 7 8 9 Match String
Confusion between B and 8
OCV mode will choose 8 since it was
in match string.
Inspection String
6 7 8 9 Match String
6 7 B/3 9
Confusion between B and 3
OCV mode will insert ? since neither B
or 3 were in match string at that position.
Inspection String 6 7 B/8 9
To change the operating mode:
1. Click the cursor in the Mode box for the tool being edited. This brings up
the Mode panel that allows you to choose the operating mode.
Mode Panel
Click in Mode box
to display Mode panel.
2. Select the appropriate mode.
3. Click the Done button.