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Quadrus EZ Reader User’s Manual
15-9
Ethernet
Primary (Command) TCP Port
This port is used for all command processing and data outputs (except “binary frame”
command responses). The application protocol used is the same as the Host RS-232 port.
Video TCP Port
The Video TCP port is transmit-only (output from the reader, read-only by the Host), and is
used for “binary frame” data outputs as follows:
1. Response to Image Send command <op,4>
2. Response to Capture and Decode and Save command <op,5>
3. Response to Symbol Information command <op,8>
4. Response to Histogram command <op,14>
The primary purpose of this port is for access to a dedicated video stream for Easy Setup
Mode functions in Windows-based ESP configuration and evaluation program, in particular.
Because the format of the “binary frame” data is quite different from the reader's other
command responses and outputs, sending this data on a dedicated, independent TCP
port facilitates easier ESP implementation. Also, end users who wish to implement their
own applications may find this useful since it has a consistent data type and provides
access to a port whose only traffic is that which the host application has initiated.
The Video TCP port is read-only from the host's perspective. The reader does not receive
any data or commands on this port. The reader only processes commands from the primary
(Command) TCP port. Also, the reader only responds to the video port if the video port
has a connection to the host and a command is received that requires a “binary frame”
response. If the video port is unconnected, the reader will respond to the primary port. This
allows hosts the option to operate over a single port.