You must acknowledge existing messages by issuing commands with the generic format:
#x@‘‘‘‘<eom>
where
# Start-of-message character
x Message sequence number. This must be the same as the sequence number of the
message being acknowledged
@ ACK (acknowledgment character)
<‘‘‘‘> Wild card CRC value for the message
<eom> End-of-message character
The following is a typical sequence after power-on limiting buered messages.
Note: Ensure that no tags are in the field when you are performing this troubleshooting procedure.
Caution
To avoid damage to the MPRX, ensure that you have connected the antenna or a dummy load
to the reader before applying power to the reader.
Reader transmission on power-up:
#0 Model …. SN <crc><eom>
Manually enter: #0@````<eom>
Reader response: #2 Copyright 2008 TransCore <crc><eom>
Manually enter: #2@````<eom>
Manually enter: #101‘‘‘‘<eom> This puts reader into command mode
Reader response: #1Done<crc><eom>
Manually enter: #3610‘‘‘‘<eom> This puts reader into basic protocol, disabling ECP
Reader response: #Done
Enter any other desired diagnostic or directive commands in basic protocol. After maintenance is
complete enter the commands:
#00 return the reader to data mode
#611 return to error correcting protocol
#100````<eom>
return reader to data mode
Chapter 4 Communications Protocols
TransCore Proprietary
4–55
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