Black Box PC124C Installation Manual page 140

If any of the bar codes listed above has been selected, the <chkd> selection is
ignored by the interface. However, one of the following values must be entered to
ensure that the bar-code command string is complete and valid. The options for
the <chkd> parameter are:
0 = Do not calculate and add a check digit.
1 = Calculate and add a check digit to the bar code data.
<ast>: Specifies whether start/stop characters are automatically generated or
manually added. This parameter only applies to bar-code type Code 3 of 9.
For all other bar-code types, the start/stop characters are automatically
generated by the interface and input for the <ast> parameter is ignored.
However, one of the following values must be entered to ensure that the
bar-code command string is complete and valid. The options for the <ast>
parameter are:
0 = Do not automatically add start/stop characters.
1 = Automatically add start/stop characters.
If value 0 is selected, you must manually enter start/stop characters
(asterisks) together with the data. Failure to add the asterisks will cause
an invalid bar code to be printed (i.e. a bar code without start/stop
characters). If human-readables are being printed, the asterisks will
also print as human-readables.
If value 1 is selected, you must not add asterisks as start/stop
characters to the data. Adding asterisks will cause an invalid bar code
to be printed (i.e. a bar code with a start/stop character pair in the
beginning and a start/stop character pair in the end.)
<data>: The data to be printed as a bar code. Some bar codes require a certain
number of characters. Others only allow alphanumeric or numeric characters.
Before the interface processes the data string, it will check the complete data
string and verify that it is valid. This is why the ¬B at the end is so important.
If an invalid data string has been entered, the interface will print "Invalid
Data" in the place of the bar code.
LASER CARDS FOR HP 4000 TWINAX AND COAX PRINTERS
NOTE
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