NCR 7800 - Check Digit; Retransmit on ACK;NAK Timer Expiration

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Permits you to enable or disable the transmission of UPC-A,
UPC-E, EAN-8, and EAN-13 check digits. Scan the
appropriate
Hex 0
through
Hex 3
. The default is enable UPC-
A, EAN-8, and EAN-13 and disable UPC-E.
A timer is set when sending a message to the host terminal or
PC. If the timer expires before receiving an ACK or NAK
response, the message is sent again. Scan the
Hex 0
tag to
disable this function or the
Hex 1
tag to enable it. The default
is for retransmit on ACK/NAK Timer Expiration to be
enabled.
Check Digit
Retransmit on
ACK/NAK Timer
Expiration