Compuprint 10200 Programmer Manual - Manual (Page 96)

Commands
92
UPC-EAN 2 DC4 DC4 ESC! n 5 p EM
ADD ON-2 bar code data fields contain numeric data only: question marks will
be printed in place of HRC string otherwise, if possible.
If 3-digit strings will be received within a DC4 DC4 ESC (... EM control
sequence and o check-digit option field is missing or takes NULL value, the
symbol will encode the first 2 digits and the 3rd received digit will be used as
check digit, even though this may affect its readability; if o field takes 1 value,
the 3rd digit is matched versus the internally generated check-digit an question
marks will printed in place of HRC string when mismatching, if possible.
If 2-digit strings will be received and o check digit field is missing or takes
NULL value, question marks will be printed in place of HRC string, when
possible; if o field takes value 1, the check digit will be computed applying the
internally available algorithm to the received string in order to properly encode
the symbol.
If f field is missing or takes value 1, the 2-digits HRC string will be printed
above the Bar/Spaces symbol and its height will be part of the overall symbol’s
height; the check-digit will never show on HRC string. If f field takes value 0,
the symbol’s encoding will print at full height.