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SIS Configuration and Control
The SW2/SW4 can be remotely set up and controlled via a host
computer or other device (such as a control system), attached
to the rear panel Remote/Auto-SW port, using the Extron
Simple Instruction Set (SIS
Remote/Autoswitching Connector" in chapter 2, "Installation,"
for information on connecting to this port.
Host-to-Switcher Communications
SIS commands consist of one or more characters per field. No
special characters are required to begin or end a command
sequence. You can enter these commands from your
computer using a communication software program such as
HyperTerminal. When the switcher determines that a command
is valid, it executes the command and sends a response to the
host device.
Most responses from the SW2/SW4 to the host computer 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.
Switcher-initiated messages
When a local event such as a front panel selection takes place,
the switcher responds by sending a message to the host,
indicating what selection was entered. No response is required
from the host. The following SW2/SW4-initiated message is
displayed:
(C) Copyright 2007, Extron Electronics DVI Switcher Series,
Vx.xx, 60-840-xx
The switcher sends the copyright message when it first powers
on. Vx.xx is the firmware version number.
N
This message is displayed only at power-up.
Error responses
If the switcher is unable to execute a command it receives
because the command is invalid or contains invalid parameters,
the SW2/SW4 returns an error response to the host. Error
response codes and their descriptions are as follows:
E01 – Invalid input channel number (out of range)
E06 – Invalid input selection during autoswitch
E10 – Invalid command
E13 – Invalid value (out of range)
SW DVI A Series • SIS Configuration and Control
4-2
) commands. See "Wiring the
™
Using the Command/Response Table
The command/response table on the following pages lists
valid ASCII and hexadecimal command codes, the switcher's
responses to the host, and a description of the command's
function or the results of executing the command.
The ASCII to HEX conversion table below is for use with the
command/response table.
ASCII to HEX Conversion Table
Symbol definitions
]
= CR/LF (carriage return/line feed) (hex 0D 0A)
} = Soft carriage return (no line feed)
•
= Space
E
= Escape key
X!
= Input number
0 through the maximum number of inputs (2 or 4)
0 = output mute
X@
= On/off and signal status
0 = Off/signal not present
1 = On/signal present
X#
= Firmware version (to the second decimal place
N
Unless otherwise indicated, commands are not case
sensitive.
SW DVI A Series • SIS Configuration and Control
•
4-3
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