Plessey Code for single-direction scanning
Legacy inventory-control setups whose scanners read labels in one fixed direction only use this generator with a preset applied for that scanning style.
Same generator, one preset applied
This experience uses the same Plessey Code capability as the primary generator, with a unidirectional guard-bar pattern ("unidirectional": true) instead of the default bidirectional pattern.
Example data
The generator is seeded with a bwip-js-verified valid value, distinct from the primary's example.
Workflow
Enter your digits/A-F data, confirm the computed check digits are accepted, then export SVG for the inventory label.
Job-specific settings
No job-specific options beyond the fixed guard-bar pattern are applied here.
Scanning notes
A unidirectional symbol is meant to be scanned in one fixed direction; a bidirectional reader can still read the default (unidirectional: false) pattern from either direction.
Common mistakes
A character outside the digits/A-F charset is the most common rejection.
Reference
Plessey Code is documented in the bwip-js/BWIPP symbology reference.
Related
For the unrelated, digits-only Modified Plessey/MSI symbology, use the MSI generator instead.