Honeywell ORBIT 7120PLUS, User Manual

Page: 58 / 241

44 Orbit 7120plus/7190g User Guide
Host Acknowledgment
Some applications require that the host terminal (or server) validate incoming bar
code data (database look-up) and provide acknowledgment to the scanner
whether or not to proceed. In Host ACK Mode, the scanner waits for this acknowl-
edgment after each scan. Visual and audible acknowledgments provide valuable
feedback to the scan operator. The Host ACK functionality is controlled via a num-
ber of pre-defined escape commands that are sent to the scanner to make it
behave in different ways.
Note: System performance degrades when using Host ACK at rates lower than 9600 baud.
The following criteria must be met for the Host ACK to work correctly:
• The scanner must be configured for Host Port RS232 (terminal ID = 000) or USB
COM Emulation (terminal ID = 130).
• RTS/CTS is defaulted off. You must enable it if the host system requires it.
• Host ACK must be set to On ( page 45 ).
• A comma must be used as a terminator.
• The host terminal software must be capable of interpreting the bar code data,
make decisions based on the data content, and send out appropriate escape
commands to the scanner.
The commands to which the scanner responds are listed on page 45 . The [ESC] is a
1B in hex. A typical command string is [ESC] x, where “[ESC] x” is the escape com-
mand and the comma is the terminator, which is required.
Example: Commands may be strung together to create custom response sequences. An
example of a command string is listed below.
• [ESC]4,[ESC]5,[ESC]6,
The above example will make a scanner zero beep low, then medium, then high.
Example: A good read beep is required for any item on file, but a razz or error tone is required
if the item is not on file. In this case,
• [ESC]7, is sent from the host to the scanner for an on-file product
• [ESC]8,[ESC]8, is sent from the host to the scanner for a not-on-file product
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