Extron electronics SW USB Series Instruções de Operação descarregar pdf (Página 36)

SW USB Series • SIS Programming and Control

4-2

SIS

™

Programming and Control

PRELIMINARY

The SW USB can be remotely set up and controlled via a host computer or other

device (such as a control system) that is attached to the rear panel RS-232 port. (See

“Wiring for RS-232 Communication” in chapter 2, “Installation”, for information

on connecting to this port.) You can issue Simple Instruction Set (SIS

™

) commands

to the switcher using your computer’s RS-232 interface with a communication

software program such as HyperTerminal or Extron DataViewer.

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. 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 SW USB 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 switcher sends the following copyright message when it ﬁrst powers on.

where n is the switcher model number as well as the number of inputs, and Vx.xx is

the ﬁrmware version number.

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 SW USB returns an error response to the

host. Error response codes and their descriptions are:

E01 – Invalid input channel number (out of range)

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 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

•

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 45 46

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Extron electronics SW USB Series Instruções de Operação Página 36

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