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JANUS? 2020 Hand-Held Computer (4MB) - Intermec

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NF BC Configuration and Full ASCII Charts<br />

C<br />

This appendix includes reference tables you can use when configuring<br />

communications protocols and the key code look-up table on the reader. It also<br />

contains a full ASCII chart and charts of Code 39 bar code labels that you can scan<br />

with the <strong>JANUS</strong> <strong>2020</strong> reader.<br />

Entering ASCII Control Characters<br />

You may need to enter ASCII control characters to configure these parameters<br />

in IC.EXE or the Communications Manager screens:<br />

• Preambles and postambles. You can include ASCII control characters in<br />

postambles and preambles.<br />

• Protocol characters, such as EOR and EOM. For some communications<br />

protocols, you must set the protocol character to an ASCII control character.<br />

To enter ASCII control characters for preambles and postambles<br />

1. Decide which ASCII control character you want to set for the preamble or<br />

postamble. Use the next table to find the character and the escape sequence.<br />

ASCII Control Character Escape Sequence<br />

\ Backslash \\<br />

BEL Bell \a<br />

BS Backspace \b<br />

CR Carriage Return \r<br />

FF Form Feed \f<br />

HT Horizontal Tab \t<br />

LF Line Feed \n<br />

Other ASCII control characters \xhh where hh is the two-digit hexadecimal<br />

number for the ASCII control<br />

character.<br />

If the table does not include the ASCII control character, you must use the<br />

Full ASCII Table later in this appendix to identify the two-digit<br />

hexadecimal number for the control character.<br />

2. Use IC.EXE to configure a preamble or postamble. Move the cursor to the<br />

field for the preamble or postamble. For help using IC.EXE, see Chapter 5,<br />

“Configuring the Reader.”<br />

C-3

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