Receiver-Initiated Messages; Error Response; Timeout; Commands And Responses - Extron electronics VoiceLift User Manual

Receiver-initiated Messages

When a local event such as a volume adjustment takes place, the VLR 102 responds
by sending a message to the host. No response is required from the host. The
receiver-initiated messages are listed below (underlined). The receiver sends the copyright
and audio level messages when power is cycled to the receiver.
Copyright 20nn, Extron Electronics, VLR 102, Vn.nn, 60-938-01
Chn
Vn.nn
X$ is the volume level.
The receiver also sends this message when the volume level is changed:
Chn
Additional messages may be sent by the VLR 102 in response to changes in the contact
closure input state, relay state, or microphone channel selection.

Error Response

When the VLR 102 receives a valid SIS command, it executes the command and sends
a response to the host device. If the receiver is unable to execute the command because
the command is invalid or contains invalid parameters, it returns the following error
response to the host:
E13

Timeout

A pause of 10 seconds or longer between command characters results in a timeout. The
command operation is aborted with no other indication.

Commands and Responses

Using the Command and Response Table

The
valid ASCII command codes, the receiver responses to the host, and a description of the
command function or the results of executing the command. The ASCII to hexadecimal
conversion table below is for use with the command and response table:
Space
Upper- and lowercase characters can be used interchangeably in the command field
unless otherwise specified.
X22* X$ ]
* Aud =
is the firmware version number, X22# is the microphone channel (A, B, C, or D), and
X22* X$
* Aud=
– Invalid value (the number is out of range)
Command and Response Table for SIS
ASCII to Hex Conversion Table
Commands, starting on page 28, lists
•
VoiceLift System • SIS Configuration and Control
]
26