Rockwell Automation 5370-OCR2 PAK - Manual (Page 25)

Chapter 4
OCR Tool Configuration
4–6
OCV Options
The Alpha, Numeric and Symbols options allow you to check for characters
not contained in a match string, when using OCV mode. Otherwise the tool
will not search for characters which are not present in the match string, and
any other characters may be read as spaces.
Enabling these options will generally increase the inspection time of the tool.
With these options disabled, OCV is faster than OCR because it can verify a
string by processing only the characters contained in the match string instead
of processing all taught characters in the font. The Gray Space option is in
most cases a faster method of detecting extra characters not present in the
match string.
Clicking on a check box selects the item.
✓ Alpha specifies alphabetical characters (A
! Z and a ! z)
✓ Numeric specifies numeric characters (0
! 9)
✓ Symbols selects all characters other than alphabetical or numeric
characters
Align
The Align option can be enabled only when the first string Mode is OCV.
When Align is selected, the tool ignores all strings before the first string is
matched. For example, you may want to match a string of characters that
will not always appear on the first line in your window. The Align option
allows you to ignore the characters on lines above the line that contains the
first match string:
ABCD
EFGH
IJKL
MNO
ABCD is ignored.
Match strings are
aligned with first
match.
Inspection Window
Note: Even with the Align option enabled, the number of lines of characters
in the OCR Tool window is still limited to 4.
Mode
Specifies one of four operating modes: OCR, OCR Strict, OCV, or OCV
Strict. A selection of Disabled indicates that the string is not inspected.
Refer to page 4–15 for a description of the operating modes.