Read PDF417 Code Controls

NI Vision Builder

Identify Parts

Read PDF417 Code Controls

Main Tab

The following controls are available on the Main tab.

Control Name Description
Step Name Name to give the step.
Region of Interest The region of interest you want to use for the step.
Reposition Region of Interest When enabled, the step dynamically repositions the region of interest based on a coordinate system you built in a previous step.
Reference Coordinate System Coordinate system to which you want to link the region of interest.

Limits Tab

The following controls are available on the Limits tab.

Control Name Description
Code Equals When enabled, the decoded data must equal this string in order for the step to pass.
Code Contains When enabled, the decoded data must contain this string in order for the step to pass. You can use the following wildcards:

Special Character Interpretation
. Matches any character.
? Matches zero or one instances of the expression proceeding ?.
[ ] Encloses alternates. For example, [abc] matches a, b, or c. The following characters have special significance when used within the brackets:
- (dash) Indicates a range when used between digits or letters (for example, [0-5], [a-g], or [L-Q])

The following characters have significance only when they are the first character within the brackets:
~ Excludes the set of characters, including non-displayable characters. [~0-9] matches any character other than 0 through 9.
^ Excludes the set with respect to all the displayable characters (and the space characters). [^0-9] gives the space characters and all displayable characters except 0 through 9.
Code Read Code that the step read.
Errors Corrected Number of substitution errors that the reader corrected using inherent error correction.
Erasures Corrected Number of erasures that the reader corrected using inherent error correction.
Rows Number of rows in the barcode.
Columns Number of columns in the barcode.