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™) commands. See “Wiring the 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:

The switcher sends the copyright message when it first powers on. Vx.xx is the firmware version number.

NThis 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)

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

NUnless otherwise indicated, commands are not case sensitive.

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SW DVI A Series • SIS Configuration and Control

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