TransCore MPRX, System Manual

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MPRX
TransCore Proprietary 5–5
Serial number 000000 is the default setting and is not a valid number. If this number
appears in the sign-on message, the serial number has never been stored into reader
memory. The serial number must be assigned by factory-authorized personnel using
command
#695S...S Set Serial Number. Because only six digits are allowed in
the software, when setting the serial number skip the fourth (middle) digit of the seven-
digit number shown on the reader label.
If the flash memory checksum does not indicate verification, the sign-on message
appears as follows at a baud rate fixed at 38,400 bps:
Model [E4] Ver 0.00x
[Copyright notice]
Boot Failure Message
Upon powering up, the software performs a checksum verification on itself. The function
returns a specific value for the particular version of software. If the value returned is not
correct, the boot code assumes that the application code has been corrupted and a
failure condition exists. If the failure message does not transmit, a communications
error has occurred or the boot has failed to the extent that it cannot transmit the failure
message.
If the failure message version number equals 0.00 and no serial number exists, the
flash memory checksum has failed, and the MPRX is operating out of boot ROM. In this
case, the MPRX automatically enters download mode and waits for a new program to
be loaded into the flash memory. Contact TransCore Technical Support at 505-856-
8007 for assistance.
Tag/Message Buffer
MPRXs maintain a tag buffer in battery backed RAM to save tag IDs acquired when data
inquiry protocol is used. This buffer holds up to 500 time-stamped messages.
When the buffer fills, subsequent tag IDs will be lost.