TransCore IT241005422 Manual De Usuario

The RS–232 conduit is configured with the defined communications parameters listed 
in Table D-1.

TransCore reader systems use a programmer-to-host software protocol. The protocol 
information that is presented in this section provides reference information relevant to 
developing host software.

Each message is framed with the start-of-message (som) and end-of-message (eom) 
characters so that the host computer can detect the beginning and end of each mes-
sage.

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-
formed on the receive data.

The programmer and host interface use the following communications protocol for 
command responses and asynchronous responses.

Baud

19,200 or 38,400 (factory default)

Data bits

8

Parity

None

Stop bits

1

Software flow control

None

Hardware flow control

None