User's Manual

6-3
Chapter 6
General Software Information
This chapter provides general software information about the design of
MPI 6000 system application software, as well as information required
for using reader system components in the design and integration of an
automated toll, traffic management, or automatic vehicle identification
(AVI) system.
General Software Information
All tag programmer commands are preceded by a start-of-message (<som>) amper-
sand character (&) followed by an end-of-message (<eom>) percent character (%). All
data after the <eom> character is ignored until the next <som> is detected.
Any & character that occurs in the message between the <som> and <eom> is con-
verted to the backslash and at character (\@) sequence. Any % character is converted
to the \? character sequence. All \ characters are converted to the \\ sequence. All
<som> and <eom> character conversions are performed after the cyclic redundancy
check (CRC) has been performed on the transmit data and before the CRC is per
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formed on the receive data.
Reader commands contain only the message information and are not preceded by the
& and are not followed by the %.
Plan and Organize
Tags compatible with the eGo 4110A Reader System have sophisticated memory
organization. TransCore encourages the user to become familiar with the use and
organization of tag memory. Before starting a programming session, TransCore rec
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ommends that you plan and organize the development steps.
Communications Protocols
The MPI 6000 communicates with a host by Ethernet or serial communications proto-
cols.
Ethernet
The MPI 6000 can communicate via an Ethernet communications protocol. This con-
nection requires an RJ–45 connector for the Ethernet receptacle. The Ethernet connec-
tor is an RJ-45 jack and uses a 10-base T interface. If you use a switch between the
MPI 6000 and the host personal computer (PC), no crossover cable is required. If the
MPI 6000 is connected directly to the host PC then a crossover cable is required. If the