Extron electronic manual USB Port front panel, DMP 44 LC-initiatedMessages

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