PDF417 Double code: two arranged up and down or left and right PDF417 Barcode. The direction of the two codes must be consistent, the difference should be as small as possible, and the distance should be as close as possi

The dual code setting is divided into the following three setting modes.

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Read only single PDF417 Code: At any time, the device can only read one of the code patterns at most once PDF417 Barcode

•

Read only double PDF417 Code: The device must be detected in a code diagram at any time PDF417 Double code, and the decoded information is sent only when both codes are successfully decoded;

•

Readable odd and even PDF417 Code: When the device detects in a code diagram PDF417 When the double code and the double code are successfully decoded, the double code decoded

information will be sent, otherwise, the picture will be read only single code.

* * [Read only single PDF417 code】

【Readable odd and even PDF417 code】

[Only read double PDF417 code】

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