TransCore encompass 4 - Chapter 4 Installing the Encompass 4 Reader

Startup
Upon startup, Encompass 4 Reader’s transmit a sign-on message or a boot ROM failure message.
Sign-On Message
If startup is successful, the sign-on message appears as follows:
Model E4 Series [software version]
SNYYYYYY [Copyright notice]
where YYYYYY is the serial number assigned to the 4800 Reader unit being used.
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 first and fourth digits of
the eight-digit number shown on the reader label.
If the flash memory checksum does not indicate verification, the sign-on message appears as follows:
Model [E4] Ver 0.00x
[Copyright notice]
Boot Failure Message
The software performs a checksum function on itself. The function returns a specific value for the particular
version of software. If the value returned is not correct, the boot ROM checksum assumes that locations
have been corrupted and a failure condition exists. If the boot ROM checksum is not correct, a boot failure
message is transmitted. If the failure message does not transmit, a communications error has occurred or
the boot 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 Encompass 4 Reader is operating out of boot ROM. In this case, the
Encompass 4 Reader automatically enters download mode and waits for a new program to be loaded
into the flash memory. Follow the instructions in “Program Download” on page 5–69 to download a new
program.
Tag/Message Buer
In basic communication protocol, the Encompass 4 Reader does not provide tag memory storage beyond
the quantity required for uniqueness checking. This feature allows adequate buering of tag data under
normal operating conditions. The Encompass 4 Reader cannot operate as a stand-alone component.
When the buer fills, subsequent tag IDs will be lost.
In error correcting protocol (ECP), a buer of up to three additional tag reads will be held in case a host
system is unable to acknowledge tag reads in real time.
Encompass 4 Reader System Guide
TransCore Proprietary.
5–70