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Host Port Protocol
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
Note: In all protocol modes, the preamble
strings can be used to frame the decode data, and both are included in calculating the
LRC
(Longitudinal Redundancy Check).
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>
ACK/NAK
Definition:
See the
Serial Cmd:
<K140,4>
Polling Mode
Definition:
See the
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
MS-4Xi Imager User's Manual
<K141>
ACK/NAK Options
command <K147>.
Polling Mode Options
and postamble
<K142>
command <K148>.
Communications
character
3-5
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