Metrologic Instruments IS4921 - Manual (Page 29)

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Example 2:
The following sample illustrates the serial command sequence for configuring the engine for the
factory default settings, disabling Code 128 scanning, and adding a “G” as a configurable prefix.
Commands for features that require sequences of multiple bar codes for activation (i.e. prefixes,
suffixes, and timeout features) should be sent in the same order that they are normally scanned.
Feature Host Command ASCII Representation
Engine
Response
Enter Configuration Mode [stx]999999[etx] 02h 39h 39h 39h 39h 39h 39h 03h [ack] or 06h
Load Defaults [stx]999998[etx] 02h 39h 39h 39h 39h 39h 38h 03h [ack] or 06h
Disable Code 128 [stx]100113[etx] 02h 31h 30h 30h 31h 31h 33h 03h [ack] or 06h
Configure Prefix #1 [stx]903500[etx] 02h 39h 30h 33h 35h 30h 30h 03h [ack] or 06h
Code Byte 0 [stx]0[etx] 02h 30h 03h [ack] or 06h
Code Byte 7 [stx]7[etx] 02h 37h 03h [ack] or 06h
Code Byte 1 [stx]1[etx] 02h 31h 03h [ack] or 06h
Exit Configuration Mode [stx]999999[etx] 02h 39h 39h 39h 39h 39h 39h 03h [ack] or 06h
Abbreviated ASCII Table
Character Hex Value Decimal Value
[STX] 02h 2
[ETX] 03h 3
[ACK] 06h 6
[NAK] 15h 21
0 30h 48
1 31h 49
2 32h 50
3 33h 51
4 34h 52
5 35h 53
6 36h 54
7 37h 55
8 38h 56
9 39h 57