Chapter 7: Programming 7-43
If you enable ACK/NAK, each message sent to the host terminal must be acknowledged before sending the next message. Receiving the message properly causes an ACK to be sent, and if there are any errors, a NAK is sent instead and the scanner/scale sends the message again. Also, any valid message other than NAK or XOn/XOff, if enabled, serves as an ACK as long as the message from the scanner/scale is completed before the host terminal starts sending the valid message to the scanner/scale.
An XOff message turns the scanner transmitter off until the scanner/scale receives an XOn message. An XOn message can be received at any time. If the scanner/scale is sending a message when it receives an XOff, since these messages can be received any time, data transmission stops after sending the current byte. When the scanner/scale receives the next XOn it sends the remainder of the message. The scanner/scale does not acknowledge XOff and XOn messages with ACK or NAK messages.
You select the interface by scanning the appropriate Hex 0 through Hex 3 tag. The default is None.
Check Digit
The Check Digit parameter permits you to control the transmission of
Note: Although this is an
