Extron Electronics RGB 203 Rxi User Guide - Manual (Page 30)

SIS Commands
This section shows how to control the RGB 203 Rxi with Extron Simple Instruction Set (SIS)
commands. The RS-232 protocol is 9600 baud, 1 stop bit, no parity, and no flow control.
Connecting the Control Computer
The rear panel Remote connector on the interface can be connected to the serial port of a
computer or control system, or to a remote contact closure device. Remote communications
with the interface are via the SIS commands, the Extron control program (see the previous
section), or contact closure.
Pin RS-232 Contact closure Function
1 — In#1 Input #1
2 TX
—
— Transmit data (-)
3 RX Receive data (+)
4 — In#2 Input #2
5 Gnd Gnd Signal ground
6 — In#3 Input #3
7 — — —
8 — — —
9 — — —
Female
5 1
9 6
Simple Instruction Set (SIS) 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 =
] ), which signals the end of 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).
The interface displays the copyright message when it first powers on.
Vx.xx is the firmware
version number.
(C) Copyright 2002, Extron Electronics, RGB 203 Rxi, Vx.xx ]
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:
RECONFIG ]
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 and Response table in this
chapter).
RGB 203 Rxi • SIS Commands 24