Newland NLS-EM20-EX, User Manual, Page: 97 / 187

Startup settings
check
Code 39 It is not mandatory to include a check character in the barcode data. If there is a check character, it must be the last of the data 1 Bytes. The check character is a value calculated from all data
except the check character to check whether the data is correct.
•
Set as " Prohibit " Then the scanner will transmit all bar code data normally.
•
Set as " Enable, do not transmit check character " , The scanner will 1 Bit data is checked. If the check is passed, the normal data except the last check character will be transmitted. If the check
fails, the barcode content will not be sent.
•
Set as " Enable, send check character " Then the scanner will 1 Bit data is checked, if the check is passed, the check character will be regarded as the last of normal data
1 The bits are transmitted together, and the barcode content will not be sent if the verification fails.
* * 【Prohibited】
[Enable, do not transmit check characters]
[Enable, send check character]
When set to "enable, do not transmit check character", if the data length is deducted 1 After the check character of the byte is less than the minimum reading length limit,
The barcode reading will fail.
For example: in the current scanner settings Code 39 The minimum reading length is 4 Byte, check character is not transmitted, and the total length must be read at this time 4 byte
of Code 39 Will fail!
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Exit settings