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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)
?
NAK
(negative acknowledgment character)
<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>
returned if the host transmission is not a legal command with legal data.
ECP host transmission
#7647XXX<crc><eom>
where
#
Start-of-message character
7
Message sequence number
647XXX
Select RF Operating Frequency command where
647XXX
is the command and
XXX
is
a hexadecimal value from 000 to 118. In this example,
XXX
sets the RF frequency to 903
MHz.
<crc>
CRC value for the message
<eom>
End-of-message character
#Done
Command has been invoked by the MPRX
MPRX User Guide
TransCore Proprietary
4–48
Содержание MPRX 10-7200-001
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