Motorola MT2090 用户手册

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MT2070/MT2090 User Guide

High/low/high/low beeps

Successful program exit with change in parameter setting.

2 long low beeps 

File ID error. A bar code not in the current MPDF sequence was scanned.

4 long low beeps 

Bad symbology. Scanned a 1D or 2D bar code in a MPDF sequence, a duplicate 
MPDF label, a label in an incorrect order, or trying to transmit an empty or illegal 
MPDF field.

4 short high beeps

The device has not completed initialization. Wait several seconds and scan again.

Low/medium/high beeps 

upon scanning a USB device 
type

Communication with the bus must be established before the device can operate at 
the highest power level.

Low/medium/high beeps 

occur more than once.

The USB bus can put the device in a state where power to the device is cycled on 
and off more than once. This is normal and usually happens when the PC cold 
boots.

1 short high beep

A <BEL> character is received and Beep on <BEL> is enabled.