Metrologic Instruments MS5100 Manuel D’Utilisation

 

 

19

S

CANNER 

O

PERATION

 

 

EXAMPLE #3:  
 
The following example shows the events that occur when an invalid bar code 
is sent.  This sample will load the factory default settings and then set the 
baud rate to 19200. 

 

Enter Configuration Mode  [stx]999999[etx] 02h 39h 39h 39h 39h 39h 39h 03h  [ack] or 06h 

Load Defaults 

[stx]99999:[etx] 02h 39h 39h 39h 39h 39h 3Ah 03h  [nak] or 15h 

Invalid command was sent, you must start over! 

Enter Configuration Mode  [stx]999999[etx] 02h 39h 39h 39h 39h 39h 39h 03h  [ack] or 06h 

Load Defaults 

[stx]999998[etx] 02h 39h 39h 39h 39h 39h 39h 03h  [ack] or 06h 

19200 Baud Rate 

[stx]415870[etx] 02h 34h 31h 35h 38h 37h 30h 03h  [ack] or 06h 

Exit Configuration Mode 

[stx]999999[etx] 02h 39h 39h 39h 39h 39h 39h 03h  [ack] or 06h 

The scanner will beep three times! 

 

 

 

 

This example illustrates two important points. 

 

First, if an invalid command is sent from the host, the scanner responds with 
a [nak] and the end-user must start over from the beginning. 
 
Second, if a command is sent to change the Baud Rate, the new baud rate 
does not take effect until after the end-user exits configuration mode. 

 

ABBREVIATED ASCII TABLE 

 

[STX] 02h  2 
[ETX] 03h  3 

[ACK] 06h  6 
[NAK] 15h  21 

0 30h 48 
1 31h 49 
2 32h 50 
3 33h 51 
4 34h 52 
5 35h 53 
6 36h 54 
7 37h 55 
8 38h 56 
9 39h 57