Xon/Xoff; Ack/Nak; Scanner To Bioptic Communication - Honeywell Xenon 1900 User Manual

XON/XOFF

Standard ASCII control characters can be used to tell the scanner to start sending
data (XON/XOFF On) or to stop sending data (XON/XOFF Off). When the host
sends the XOFF character (DC3, hex 13) to the scanner, data transmission stops.
To resume transmission, the host sends the XON character (DC1, hex 11). Data
transmission continues where it left off when XOFF was sent. Default = XON/XOFF
Off.

ACK/NAK

After transmitting data, the scanner waits for an ACK character (hex 06) or a NAK
character (hex 15) response from the host. If ACK is received, the communications
cycle is completed and the scanner looks for more bar codes. If NAK is received, the
last set of bar code data is retransmitted and the scanner waits for ACK/NAK again.
Turn on the ACK/NAK protocol by scanning the ACK/NAK On bar code below. To
turn off the protocol, scan ACK/NAK Off. Default = ACK/NAK Off.

Scanner to Bioptic Communication

The following settings are used to set up communication between Honeywell scan-
ners and bioptic scanners.
Note: The scanner's baud rate must be set to 38400 and the RS232 timeout must be set to
3000 in order to communicate with a bioptic scanner. See "RS232 Modifiers" on page
34, and
38
XON/XOFF On
ACK/NAK On
RS232 Timeout on page 37 for further information.
* XON/XOFF Off
* ACK/NAK Off
Xenon/Granit User Guide