NCR 7890, Руководство пользователя, Страница: 131 / 217

Programming Your 7890 Scanner
Label Identifiers
5-56 User’s Guide
The Common Byte 1 and Common Byte 2 parameters
permit you to specify the data sent to the host terminal
or PC in the Common Byte fields. Input this
information as two Hex characters for each Common
Byte. Refer to the ASCII Code Chart in Appendix A;
however, values of 20 to 7E are recommended. Do not
use the same characters as the Terminator Byte or the
message may terminate too soon. Also, a Common Byte
cannot be 00. If you are not going to use a Common
Byte, scan any Hex tag twice except Hex 0 or the
Terminator Byte value. The following table gives the
default values.
Common Byte Hex ASCII
Common Byte 1 5D ]
Common Byte 2 42 B
You must scan four tags to go to the next
parameter.
The Bar Code Type parameter selects the bar code type
for entering its associated label identifier information.
After entering a Bar Code Type, you enter the label
identifier information as described in the following
sections. This procedure repeats until you have changed
all the label identifiers for each bar code type desired.
Scan the Hex 0 through Hex 7 tag to enter the
appropriate Bar Code Type. Since you must select each
of these individually for your application, there is no
default for this parameter.
Common Byte 1 and
Common Byte 2
Note:
Bar Code Type