Extron Electronics DMP 44 LC User Guide - Manual (Page 46)

USB Port (front panel)
The DMP 44 LC has a front panel USB port that can be connected to a host device such as
a computer running the HyperTerminal utility, DSP Configurator, or the DataViewer utility.
The port makes serial control of the DMP possible. After the connection is established,
see “
Using the Command/Response Tables ” later in this section for SIS programming
details.
DMP 44 LC-initiated Messages
The DMP 44 LC initiates messages under specific conditions. No response is required from
the host. The DMP 44 LC-initiated messages are listed here (underlined).
© Copyright 2011, Extron Electronics, DMP 44 LC, Vn.nn, 60-1095-01
Vn.nn is the firmware version number.
The DMP 44 LC sends the boot and copyright messages under the following circumstance:
If the DMP 44 LC is off and an RS-232 connection is already set up (the PC is cabled to
the DMP 44 LC and a serial communication program such as HyperTerminal is open), the
connected unit sends these messages via RS-232 when first powered on.
Using the Command/Response Tables
SIS commands consist of a string (one or more characters per command field). No special
characters are required to begin or end a command sequence. When the DMP 44 LC
determines a command is valid, it executes the command and sends a response to the
host device. All responses end with a carriage return and a line feed (CR/LF = ]), signaling
the end of the response character string.
When programming, certain characters are more conveniently represented by their
hexadecimal rather than ASCII values. The following table shows the hexadecimal
equivalent of each ASCII character:
ASCII to Hex Conversion Table
•
Space
Figure 22. ASCII to Hex Conversion Table
DMP 44 LC • SIS Programming and Control 40