Chapter5General Software Information
This chapter provides software-related information for the Encompass® 4 Reader
System.
This chapter presents various software-related topics arranged in alphabetical order by subject. In addition
to this chapter, see “Chapter 6 Communications Protocols” on page 6–71 and “Chapter 7 Commands”
on page 7–86 for more information.
Command Entry Conventions
All Encompass 4 Reader commands are preceded by the start-of-message character (#). The end-of-
message sequence expected from the host is a carriage return (CR). The Encompass 4 Reader terminates
messages with a return and a line-feed (CR/LF). For example, the command #01 Switch To Command
Mode is typed as follows:
#01<ENTER>
where <ENTER> is the Enter or Return key.
Some command characters may be represented by the letter N. This letter indicates you are to supply a
value. Maximum valid entries are the numbers 0 through 9 and the uppercase letters A through F. These
letters allow for as many as 16 available user responses and are based on the hexadecimal numbering
system.
Commands have at least two characters following the # character. Table 15 shows the basic structure of a
four-character command.
Table 15 Four-Character Command Structure
#1005 Set Baud Rate To 9600 Baud
#
All commands are preceded by the # character
1
Indicates the command group. This command is in Group 1
Communications Port Control.
0
Indicates the command subgroup. In this example, all commands
with a second digit of 0 apply to the main port.
0
The command digit. In this example, the 0 indicates that this
command aects the baud rate.
5
Indicates the setting. Normally this is a variable and is usually a
hexadecimal value from 0 through F. In this example, 5 sets the
baud rate to 9600, the factory setting. In some commands, this
digit may be a four-place hexadecimal string or a character string.
Chapter 5 General Software Information
TransCore Proprietary
5–67
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