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How do I calculate a MOD10 Check Digit for GS1-128 and other Code 128 Standards?

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I need to generate a MOD10 Check Digit for GS1-128. How do I do this with your products using Code 128?

11-29-12 11.8 year(s) ago

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Ben	Best Answer Several standards of Code 128 may require a MOD10 Check Character (Digit) calculation. Some of these standards include GS1-128, SSCC-18, and SCC-14. When calculating a MOD10 for Code 128, the AI (Application Identifier) is not part of the calculation. Let's use an SSCC18 value as an example: (00)00801234999999999 The (00) is the AI character and will not be part of the MOD10 calculation. However, the remaining data, 00801234999999999, will. When the ApplyTilde option is enabled, some IDAutomation products will allow the user to encode FNC for AIs using the parentheses. If your product does not have this feature, then encode the FNC using the Tilde Method To calculate the MOD10, ApplyTilde must be enabled. Let's encode and calculate the check digit for the value above using the Tilde method. ~2120000801234999999999~m17 The ~212 identifies the two-digit AI. For three digits use ~213, for four digits use ~214, etc. The ~m17 looks at the remaining data that is not an AI and calculates the check digit. Using the Parentheses method is very similar: (00)00801234999999999~m17 The check digit is 7. The scanned result is 00008012349999999997 How do I know what to set ~m to? You must refer to the standard that you are required to generate. When generating GS1 symbols, IDAutomation recommends testing the result with the Barcode Decoder App which parses out GS1 data to verify proper encoding. Posted 11.8 year(s) ago (0) (0) Report Abuse

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