MDI-4000 Series Serial Interface Manual
Read Timeout Buzzer Commands
Disable read timeout buzzer
Enable read timeout buzzer
9.1.5 Intermediate Buzzer
If a barcode is decoded but does not yet meet the conditions to output data, an intermediate
buzzer sounds.
For example, if the buffer is configured to read five barcodes, the intermediate buzzer sounds
after the 1
st
, 2
nd
, 3
rd
and 4
th
barcodes are decoded to confirm that each barcode has been read.
When the 5
th
and last barcode is decoded, a good read buzzer sounds and the data is output.
When the good read buzzer is disabled, this setting is also disabled.
Intermediate Buzzer Commands
Disable intermediate buzzer
Enable intermediate buzzer
* Intermediate buzzer frequency: 5000 Hz (5 KHz), duration: 10 ms
9.1.6 Idle Level of BUZZERn pin
You can configure the idle level of the BUZZERn pin to minimize power consumption when the
buzzer is not active. For example, when a PNP transistor is used to drive the buzzer, the
transistor is “open” when the BUZZERn signal is low, so the idle level should be low.
To automatically maximize power, use a Custom Command Line command to make this setting
the default. For more information, see “How to Permanently Change the Factory Default
Settings” on page 11.
To activate and save the new configuration, you need to use the Z2 command (save settings in
non-volatile memory).
BUZZERn Idle Level Commands
Idle level low (Active high)
Idle level high (Active low)
9.2 Good Read LED
When an LED is connected to the GR_LEDn pin, the GR_LEDn signal controls the good read
LED.
Note: Because the scan engine can only supply a limited output current through the GR_LEDn
pin, use a transistor to amplify the current.
9.2.1 Good Read LED Duration
The good read LED lights up after a barcode is successfully decoded. You can configure how
long the good read LED stays on or disabled the LED.
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