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Appendix-save and cancel settings
After reading the data code, you must read the save code to save the read data. If an error
occurs when reading the data code, you can cancel reading the wrong data in addition to
resetting.
For example, read a certain setting code and read the data "1", "2", and "3" in turn. At this
time, if you read "cancel the previous data read", the last read number "3" will be
cancelled , If you read "Cancel a string of data previously read", the read data "123" will be
canceled; if you read "Cancel current setting", it will cancel the setting code together.
Save Settings
Cancel the previous data read
Cancel a string of data previously read