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MS-2 CCD Reader User’s Manual A-7

Appendices

Serial Command Format

Serial commands are of two types: utility and configuration.

Rules that apply to both Utility and Configuration commands

• A less than < and greater than > character enclose the commands.

• Commands and data are “case-sensitive.” That is, characters must be entered as upper

or lower case, as specified.

Serial Utility Commands

These are sent during operations and are not followed by <A> or <Z>.

Serial Configuration “K” Commands

These begin with a single “K” character followed by a 3-digit numeric value, data fields,

and an initializing command, as follows:

An initializing command <A> or <Z> may follow the command. A <Z> initializes the

reader’s memory and saves for power-on; an <A> initializes the reader’s memory but does

not save for power-on.

For example, to enable UPC and save the change for power-on, send <K473,1><Z>.

To change Baud Rate to 4800 and reset without saving changes for power-on, send

<K100,3><A>.

Serial Configuration Command Conventions

• All data fields (except the last) must be followed by a comma without a space.

• Typically, NUL cannot be used. The characters <, >, and

, can be used, but only if

entered as hex pairs.

• All fields preceding a modified field must be included unless there is no change in the

preceding fields.

• If there is no change in preceding fields, then commas alone can be entered in these

fields. For example, if only the last field in the command <K100,4,1,0,1> is changing, it

can be entered as <K100,,,,1>.

• All fields following a modified field can be omitted. For example, to change Baud Rate to

4800 without changing the other host port paramters, send <K100,3>.

Concatenating Configuration Commands

Commands can be concatenated (added together) in a single string.

For example, <K100,4><K222,1><K470,0><A> sets the Baud Rate to 9600, enables

Multiple symbol mode, disables Code 39, and resets the data buffers (without saving the

changes for power-on).

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