PSC Scanners Programming Manual page 62

To find the hexadecimal values for the characters turn to the Hexa-
decimal Conversion Table. The procedure for selecting a symbology
identifier is identical to the procedure for selecting Preambles and
Postambles. The similar difference is that symbology identifiers are a
maximum of two characters, not four.
NOTE
The FC programming symbol selects the symbology identifiers for
use with ICL 9518/9520 cash registers.
FC
The FD programming symbol selects the symbology identifiers for
use with ICL 9518/9520 cash registers as given in Table 5.
FD
56
Scanning the ZA (Result to Default) programming symbol
will set all symbology identifiers back to PSC defaults as
given in Table I and disable the transmission of the sym-
bology identifiers.
Programming Symbol
Programming Symbol
User's / Programming Guide