NCR RealScan 7892, User Manual

Page: 96 / 142

5-38 Chapter 5: Programming
RS-232 Prefix Byte
RS-232 Prefix Byte Programming mode controls the use of prefix bytes.
If you use an RS-232 Prefix Byte, it is the leading character in each
message sent to the host terminal or PC. Following it is the message
data. Refer to the RS-232 Prefix Byte Worksheet (22) in Chapter 7.
Prefix Byte
The Prefix Byte parameter contains two selections: Disable and Enable.
Scan the Hex 0 tag to disable the Prefix Byte, or the Hex 1 tag to enable
it. The default is Disable.
ASCII Code
The ASCII Code parameter permits you to specify what ASCII code to
use for the Prefix Byte. Enter your selection by scanning the
appropriate two Hex tags. Refer to the ASCII Code Chart in Chapter 7.
You can select any value from 01 through 0F. Start Of Text (STX)
ASCII Code 02 Hex is recommended. Scan the two appropriate Hex
tags (Hex 0 through Hex 7 for the first character and Hex 0 through
Hex
F for the second). The default for this parameter is 02.
Parameter Shortcuts
The RS-232 Prefix Byte Programming mode contains 2 shortcuts: A and
B. After entering this programming mode you can go directly to a
specific parameter by scanning the appropriate shortcut Hex tag
(Hex A or Hex B). This eliminates the need to enter all parameters
when only one needs changing.