CTR 8 • Remote Communication and Control 6
Remote
Communication
and Control
This section covers the following:
z Using Simple Instruction Set (SIS) Commands
z Symbols Used in this Guide
z Command and Response Table for SIS Commands
z A/V Muting
Using Simple Instruction Set (SIS) Commands
The CTR 8 is controlled remotely using Extron SIS commands issued from a host computer
running the Extron DataViewer utility or other control system. The host device is connected to the
3-pole captive screw connector on the rear panel.
The protocol is 9600 baud, 8 data bit, 1 stop bit, and no parity.
Host-to-CTR 8 Communications
SIS commands consist of strings (one or more characters per command field). No special
characters are required to begin or end a command sequence. When the CTR 8 determines that
a command is valid, it executes the command and sends a response to the host device.
Most responses from the CTR 8 end with a carriage return and a line feed (CR/LF = ]), which
signals the end of the response character string.
CTR 8-Initiated Messages
When a local event such as a change in signal status takes place, the CTR 8 sends a message
to the host, indicating the status change. No response is required from the host.
When the CTR 8 is first switched on, it sends the message:
(c) Copyright 20yy, Extron Electronics, CTR 8, V x.xx, 60‑1408‑01] where
20yy is the year the currently installed version of the firmware was released, and V x.xx is the
firmware version number.
