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SIS Communication
and Control
The DSC 301 HD can be configured and controlled via a host computer or other device
(such as a control system) attached to the rear panel RS-232 connector or the front panel
USB port. Control is made using the Extron SIS commands.
Commands can be entered using a Telnet application such as the Extron DataViewer,
available at
This section describes SIS communication and control. Topics that are covered include:
•
•
•
The scaler uses a protocol of 9600 baud, 1 stop bit, no parity, and no flow
control and the rear panel remote port RS-232 captive screw connector has
the pin assignments as shown at right.
Host-to-Scaler Communications
SIS commands consist of one or more characters per field. No special characters are
required to begin or end a command sequence. When the DSC 301 HD determines that a
command is valid, it executes the command and sends a response to the host device.
All responses from the scaler to the host end with a carriage return and a line feed
(CR/LF =
characters).
Scaler-initiated Messages
When a local event such as a front panel selection or adjustment takes place, the
DSC 301 HD scaler responds by sending a message to the host. No response is required
from the host. Example scaler-initiated messages are listed here.
•
•
•
Copyright Information
] © Copyright 2014, Extron Electronics, DSC 301 HD, Vn.nn, 60-1253-01]
The copyright message is displayed upon connecting to the product via USB or RS-232.
Vn.nn is the firmware version number.
www.extron.com
Host to Scaler Communications
Commands and Responses
SIS Command and Response Table
]
), indicating the end of the response character string (one or more
In X! All
]
X!
(where
is the input number during an input switch).
Reconfig
]
The DSC 301 HD sends this response when a new signal is detected.
HplgO
X@ ]
The DSC 301 HD sends this response when a hot plug event on output
X@
is detected.
(see the DataViewer Help file for use).
DSC 301 HD • SIS Communication and Control
REMOTE
RS-232
Tx Rx G
22
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