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Remote Control
Remote Control, cont'd
There are three ways to control input selection and centering
features of an RGB 202 Rxi /RGB 202 Rxi VTG interface: by using
the front panel controls, by using an RS-232 remote control
device, and by using a contact closure keypad.
RS-232 Programmer's Guide
The interface can be remotely controlled via a host computer or
other device (such as a control system) attached to the rear panel
9-pin D RS-232 connector. The protocol is 9600 baud, 1 stop bit,
no parity, and no flow control.
The control device (host) can use either Extron's Simple Instruc-
tion Set (SIS) commands or the graphical control program for
Windows. RS-232 control software is included with the interface.
The rear panel RS-232 9-pin D female
connector has the following pin assignments:
Pin
RS-232 function Contact closure
1
–
2
Tx
3
Rx
4
–
5
Gnd
6
–
7
–
8
–
9
–
Host-to-interface communications
SIS commands consist of one or more characters per field. No
special characters are required to begin or end a command
sequence. When a command is valid, the interface executes the
command and sends a response to the host device. All respon-
ses from the interface to the host end with a carriage return and
a line feed (CR/LF =
character string. A string is one or more characters.
Interface-initiated messages
When a local event such as a front panel or contact closure
selection or adjustment takes place, the interface sends a
message to the host. No response is required from the host. The
interface-initiated messages are listed here (underlined).
(C) Copyright 2000, Extron Electronics, RGB 202 Rxi, Vx.xx
The interface displays the copyright message when it first
powers on. Vx.xx is the firmware version number.
RGB 202 Rx x x x x i i i i i , RGB 202 Rx x x x x i i i i i VTG • Remote Control
3-2
5
1
9
6
DB9 Pin Locations
Female
Description
Input 1
Select input #1
–
Transmit data
–
Receive data
Input 2
Select input #2
Gnd
Signal ground
–
Not used
–
Not used
–
Not used
–
Not used
), which signals the end of the response
RECONFIG
When a change is made via a front panel control or another
operation occurs that must be written to a new memory block,
the interface sends the reconfiguration message. No response is
required from the RS-232 host, but the host may request a new
status listing via the request information command (I/i). See
the command/response table in this chapter for details.
Chn
The input number has been changed or,
X2
for the RGB 202 Rxi VTG, the VTG has been turned on or off.
Error responses
When the interface receives a valid SIS command, it executes the
command and sends a response to the host device. If the
interface is unable to execute the command because the
command is invalid or it contains invalid parameters, it returns
an error response to the host.
The error response codes and their descriptions are as follows:
E01 – Invalid input number (the number is too large or small;
occurs when attempting to select VTG mode via RS-232)
E06 – Invalid input selection (occurs when selecting an input when
the RGB 202 Rxi VTG is set to VTG mode)
E10 – Invalid command
E13 – Invalid value (the number is out of range/too large)
Using the command/response table
The command/response table lists valid command ASCII codes,
the interface's responses to the host, and a description of the
command's function or the results of executing the command.
Lower case characters are acceptable in the command field only
where indicated. The ASCII to HEX conversion table below is
for use with the command/response table.
ASCII to HEX Conversion Table
RGB 202 Rx x x x x i i i i i , RGB 202 Rx x x x x i i i i i VTG • Remote Control
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