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Chapter 8 Bar Codes

428T Operator’s Manual - 880037-0141 8-17

E- Edifact 63 ASCII plus un-latch char 6

Table 8-6 Data Matrix Encoding Schemes

ACSII Encoding Scheme

ASCII encoding is the basic scheme that encodes ASCII data, double density numeric data

and symbology control characters. Which means it encodes one alphabetic or two numeric

characters per byte. All other encoding schemes are invoked from ASCII and will then

return to this scheme through the use of code words.

C40 Encoding Scheme

C40 encoding scheme is used to encode uppercase alphabetic, numerical and space

characters. C40 encodes three alphanumeric data characters into two bytes.

Text Encoding Scheme

Text encoding is primarily used to encode lowercase alphabetic and numerical characters.

Text encodes three alphanumeric data characters into two bytes.

Base 256 Encoding Scheme

The Base 256 encoding scheme is used to encode any 8-bit byte data, including extended

channel interpretations (ECI’s) and binary data.

X12 Encoding Scheme

X12 encoding scheme is use to encode the standard ANSI X12 electronic data interchange

characters, which are compacted three data characters to two codewords in a manner

similar to C40 encoding.

Edifact Encoding Scheme

X12 encoding scheme includes 63 ASCII values (values from 32 to 94) plus an Unlatch

character (binary 011111) to return to ASCII encoding. Edifact encoding encodes four data

characters in three codewords.

Codeword Data and/or Function

1 - 128 ASCII data (ASCII value +1)

129 Pad Character

130 - 229 2 digit data 00 – 99 (Numeric Value + 130)

230 Latch to C40 Encoding Scheme

231 Latch to Base256 Encoding Scheme

232 FNC1

233 Structured Append

234 Reader Programming

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Microcom 428T Bedienungsanleitung Seite 169