NAK | Abnormal response (negative acknowledge) |
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Format: |
| B1 B2 B3 B4 B5 A5 | |
| ASCII: | NAK | |
| Decimal: | 21 |
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| Hexadecimal: | 15 |
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Explanation: |
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This code is used by the scanner for handshaking. This code indicates that a command or a parameter was illegal and not accepted by the scanner.
When the NAK code is returned from the scanner, it means a command error has occurred in the scanner, and the command was ignored. To recover from a command error, resend a legal command or a command followed by a legal parameter.