Rice Lake Motorola DS457 Laser Scanner - Manual (Page 138)

8 - 12 DS457 Fixed Mount Imager Integration Guide
Check Parity
Parameter # 97h
Select whether or not to check the parity of received characters. Use the Parity parameter to select the type of
parity.
Software Handshaking
Parameter # 9Fh
This parameter offers control of data transmission in addition to the control hardware handshaking offers.
Hardware handshaking is always enabled; you cannot disable it.
• Disable ACK/NAK Handshaking
: When this option is selected, the imager neither generates nor
expects ACK/NAK handshaking packets.
• Enable ACK/NAK Handshaking
: When this option is selected, after transmitting data, the imager
expects either an ACK or NAK response from the host. The imager also ACKs or NAKs messages from
the host.
The imager waits up to the programmable Host Serial Response Time-out to receive an ACK or NAK. If
the imager does not get a response in this time, it resends its data up to two times before discarding the
data and declaring a transmit error.
*Do Not Check Parity
(00h)
Check Parity
(01h)
Disable ACK/NAK
(00h)
*Enable ACK/NAK
(01h)