Simple Instruction Set Control; Host-To-Interface Communications; Interface-Initiated Messages; Error Responses - Extron electronics RGB 203 Rxi User Manual

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Remote Control
Remote Control, cont'd
The interface's rear panel Remote connector (Figure 3-1) can be
connected to the serial port output of a host device, such as a
computer or control system or to a remote contact closure
device. Remote communications with the switcher are via
Extron's Simple Instruction Set, Extron's Windows-based
control program, or pin-programmed in the case of a contact
closure device.
5 1
Pin
1
2
3
9 6
Female
4
5
1 5
6
7
8
6 9
9
Male
Figure 3-1 — Remote connector pin assignments
The RS-232 protocol of the rear panel Remote connector is 9600
baud, 1 stop bit, no parity, and no flow control.

Simple Instruction Set Control

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
responses from the interface to the host end with a carriage
return and a line feed (CR/LF =
the response 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 2002, Extron Electronics, RGB 203 Rxi, Vx.xx
The interface displays the copyright message when it first
powers on. Vx.xx is the firmware version number.
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
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3-2 RGB 203 Rxi, RGB 203 Rxi VTG • Remote Control
RS-232 Contact closure Function
— In#1 Input #1
TX — Transmit data (-)
—
RX Receive data (+)
— In#2 Input #2
Gnd Gnd Signal ground
— In#3 Input #3
— — —
— — —
— — —
), which signals the end of
CAMBOARD Electronics

Error responses

Timeout

Using the command/response table

Tel. 07131 911201
Fax 07131 911203
status listing via the request information command (I/i). See
the command/response table in this chapter for details.
Chn
X2
The input number has been changed or, for the
RGB 203 Rxi VTG, the VTG has been turned on or off.
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 203 Rxi VTG is set to VTG mode)
E10 – Invalid command
E13 – Invalid value (the number is out of range/too large)
Pauses of 10 seconds or longer between command ASCII
characters result in a timeout. The command operation is
aborted with no other indication.
The command/response table is on page 3-5. Lower case letters
are allowed in the command field only as indicated. Symbols
are used throughout the table to represent variables in the
command/response fields. Command and response examples
are shown throughout the table. The ASCII to HEX conversion
table, on the next page, is for use with the command/response
table.
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RGB 203 Rxi, RGB 203 Rxi VTG • Remote Control 3-3