Denso AT20B-SM User Manual page 105

NG
(Note 1) If the scanner receives the R command twice with the reading window being applied to a code (for
example, it receives the R command, sends the code data read, and receives the Z and R commands),
it will send even the same code data twice. This is because the Z command cancels the duplication
prevention processing.
In split Barcode reading operation, if the scanner receives the Z command and switches to standby
before reading a set of split Barcode symbols, the duplication prevention processing will be canceled.
The code data that has been read halfway will be discarded.
The READOFF and LOFF commands produce the same result as the Z command, the READON and
LON commands, as the R command.
(Note 3) After receipt of one of the B1 to B3, BH1 to BH3, BM1 to BM3, BL1 to BL3, LB, LG, LR and VO
command, the scanner may need a maximum of 100 ms to execute the command.
(Note 4) Beeping specified by control commands B1, BH1, BM1, and BL1 is dependent on the reading completion
sound and its length.
(Note 5) The PW can save settings into the FLASH ROM a maximum of 1,000,000 times due to the restrictions
on the FLASH ROM.
(Note 6) These control commands are available only when the scanner is not in data verification mode.
Mismatch
Only if data output is set to "NG" when verified data does not
match, this command will be transmitted when data scanned
does not match the master code in the verification reading
mode.
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