Free MSI Plessey (Mod 1110) Barcode Generator — Create, Preview & Download Instantly

MSI Plessey (Mod 1110) is a numeric barcode symbology that appends two check digits to the encoded data: the first using the Mod 11 algorithm and the second using the Mod 10 (Luhn) algorithm. It is a variant of the MSI Plessey family, which also includes Mod 10, Mod 11, and Mod 1010 configurations. Mod 1110 provides the strongest error-detection capability of all MSI Plessey variants because it layers two independent checksum calculations on the same data payload.

For Mod 1110, the encoder first applies the Mod 11 algorithm: starting from the rightmost payload digit, it assigns alternating weights of 2, 1, 2, 1, … to each digit, computes the weighted sum, and derives a check digit from the remainder when divided by 11. If the Mod 11 result is 10, a fallback digit (typically 0) is used. The Mod 11 check digit is then appended to the payload, and the Mod 10 (Luhn) algorithm is applied to the entire resulting string — doubling every other digit from the right, summing all digits, and computing the value needed to bring the total to a multiple of 10. Both check digits are appended to the barcode and verified automatically by the scanner on every read.

MSI Plessey (Mod 1110) supports only the decimal digits 0 through 9. No letters, spaces, or special characters can be encoded. If your data contains any non-numeric character, the barcode cannot be generated. If you need to encode alphanumeric data, consider Code 128 or Code 39 instead.

The four MSI Plessey variants differ in how many check digits they append and which algorithm is used. Mod 10 appends one check digit computed with the Luhn (Mod 10) algorithm — the lightest validation. Mod 11 appends one check digit computed with the Mod 11 algorithm — stronger against transposition errors. Mod 1010 appends two check digits, both computed using the Mod 10 algorithm sequentially. Mod 1110 appends two check digits: the first using Mod 11 and the second using Mod 10 — providing the most robust error detection by combining the strengths of both algorithms. Choose Mod 1110 when data integrity is the top priority.

MSI Plessey Mod 1110 has no formally defined minimum or maximum payload length. Practically, you need at least one digit of data. The total barcode width increases linearly with each digit encoded plus the two appended check digits, so very long numeric strings will produce wide barcodes. Plan your label size to accommodate the full encoded string including both check characters. There is no artificial length cap in this generator.

No. Enter only your raw numeric payload — the data you actually want to encode. The generator automatically computes and appends both the Mod 11 check digit and the subsequent Mod 10 check digit. Including check digits manually in your input will cause them to be treated as payload data, and a second set of check digits will be appended — producing an incorrect barcode that scanners will reject.

Use Mod 1110 when you need the highest available error-detection strength and your scanning infrastructure supports or requires two-check-digit MSI Plessey validation. Mod 1110 is particularly valuable in automated high-volume scanning environments — such as conveyor-fed retail checkout systems or robotic warehouse picking — where a misread barcode has operational consequences. If your scanners or legacy systems are configured for single-check-digit Mod 10 only, use Mod 10 instead. Always verify which MSI Plessey check digit variant your scanner decoder is configured to expect before deploying labels.

Yes. All MSI Plessey Mod 1110 encoding is performed entirely in your browser using client-side JavaScript. Your input data — including any product codes, bin identifiers, or inventory numbers — is never transmitted to any server and never stored anywhere. Close the browser tab and all data is gone. This generator is safe to use with sensitive internal identifiers or proprietary inventory systems.