TransCore IT241005422 Manual De Usuario

This section describes the interaction of commands and functions.

During manufacturing of the programmer, the security characters, Ethernet parame-
ters, and serial number are set. The security characters, MAC address, and serial num-
ber are written to the programmer and can only be changed at the factory.

Each time the programmer is powered on it performs a self-test and awaits an 
acknowledgement from the host. Only the select commands are valid until the Set 
Time/Date command is issued. Further restrictions apply until the programmer pass-
word is verified using the Set Programmer Password command.

The Identify, Reset Programmer, and Get/Set Time/Date commands are always avail-
able regardless of password status. The Set Programmer Password command is only 
available after the time and date have been set and validated. The Set Serial Number 
and Set Security Characters commands are available only to the factory. Limited tag 
commands are available until the programmer password has been verified. Virtually 
all commands are available once the programmer password has been verified.

Figure D-1 illustrates the precedence of these functions. The Time/Date is set in per-
manent programmer memory. Once set and saved using Save Programmer Configura-
tion, the Time/Date no longer need to be set.

0

Invalid password

1

Backdoor password verified

2

User password verified

3

User password changed