D-5
Appendices
MicroHAWK V320-F / V330-F / V420-F / V430-F Barcode Reader User Manual
D-4 Host Port Protocol
D
D-4-1 Point-to-Point (Standard)
D-4 Host Port Protocol
•Note: In all protocol modes, the preamble <K141> and postamble <K142> character strings can be used to frame the
decode data, and both are included in calculating the LRC (Longitudinal Redundancy Check).
Usage: In general, the point-to-point protocols will work well in most applications.
They require no address and must use RS-232 communications standards.
Definition: Protocols define the sequence and format in which information is transferred
between the reader and the host.
Serial Cmd: <K140,protocol,address>
Default: Point-to-Point
Options: 0 = Point-to-Point
4 = ACK/NAK
5 = Polling Mode
D-4-1 Point-to-Point (Standard)
Usage: Used only with RS-232.
Definition: Standard Point-to-Point requires no address and sends the data to the
host whenever it is available, without a request or handshake from the host.
Serial Cmd: <K140,0>
D-4-2 ACK/NAK
Definition: See the ACK/NAK Options command <K147>.
Serial Cmd: <K140,4>
D-4-3 Polling Mode
Definition: See the Polling Mode Options command <K148>.
Serial Cmd: <K140,5>
Poll Address
Serial Cmd: <K140,protocol,address>
Default: 1
Options: 1 to 50
1 = Poll address 0x1C, Select address 0x1D
2 = Poll address 0x1E, Select address 0x1F
...
50 = Poll address 0x7E, Select address 0x7F
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