Bourgogne ET Grasset SAS VEGRDE2 Manual De Usuario

Vegas Long Range Read/Write Device 

 

27-07-2002 

Vegrde3/EG 

Confidentiality Level 1 

Page 20 (48) 

Bourgogne et Grasset  -– ZI Beaune Savigny  -– 21200 Beaune  –  France  –  Tel. +33 380 26 26 26  –  Fax. +33 3 80 26 26 00 

 

Reads all Serial numbers of Data Carriers in the active antenna field. This command is also 
called the fast command A.  
 
Serial protocol: 
 
HOST - CORE MODULE 

0x02 0x9B BCC 

Data[0] ....... Data[n+1] 

 
For every tag present you should receive 7 bytes from the reader:  

0x06 Status  Snr  snr  snr  snr  BCC 

 
When no more tags are found you receive 5 bytes from the reader:  

0x04 Status 

Collisions[0]

 

Collisions[1]

BCC 

 
Status – Equal to 0 if command completed with no error, to –3 if no tag was found or some other 
error code if at least one tag was found but the command stopped because of an error during 
execution. 
False Collisions - Can be caused by detuned antennas or electromagnetic influences. Their effect 
is mainly to increase the read time. Including this information in the response helps in adjusting 
the external environment. 
 
 

Reads all Serial numbers of Data Carriers in the active antenna field. This command is also 
called the fast command B.  
 
Serial protocol: 
 
HOST - CORE MODULE 

0x03 

0x9C 

Block Flag/Page Number

BCC 

Block Flag/Page Number – Bits 0-6 indicate the page address. Bit 7 is set to 0 for page access, to 
1 for block access. In case that no page or block retrieval is desired, this byte should be set to 0. 
 
Read/Write Device – HOST 
 

Data[0] ....... Data[n+1]