TransCore 05716 Manuel D’Utilisation

Page de 210
Communications Protocols
6-9
Reader Transmissions
Basic protocol reader transmission
    #KING 1302<eom>
Host response
No host response for non-ECP
ECP reader transmission
    #4KING 1302 <crc><eom>
where
#
Start-of-message character
4
Message sequence number
KING 1302       
Message data: Tag ID is shown. 
Other sample message data could be as follows:
IOST C0 O2 I0 D24 (display I/O status)
Error06 (frequency not set)
<crc>
CRC value for the message
<eom>
End-of-message character
Host response
#4@<crc><eom>
where
#
Start-of-message character
4
Message sequence number
@
ACK
 (acknowledgment character)
(? returned for a negative acknowledgment)
<crc>
CRC value for the message
<eom>
End-of-message character
Host Command Transmissions
Basic protocol host transmission
#647XXX<eom>
Reader response
#Done<eom> or #Error<eom> 
#Error<eom> 
is returned if the host transmission is not a legal command with legal 
data.