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5-51MLC 52 Series MediaLink Controllers • Serial Communication
Using Simple Instruction Set (SIS
™
) Commands
Simple Instruction set (SIS) commands can be entered on your PC to find out
more information about the MLC 52.
Host-to-MLC 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 MLC determines
that a command is valid, it executes the command and sends a response to the
host device. All responses from the controller to the host 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.
MLC-initiated messages
When a local event such as a front panel (or Extron switcher front panel)
selection or adjustment takes place, the MLC responds by sending a message to
the host. No response is required from the host. The MLC-initiated messages are
listed here (underlined).
(C) Copyright 2005, Extron Electronics MLC 52, Vx.xx
The MLC sends the copyright message when it first powers on.
Error responses
When the MLC receives a valid SIS command, it executes the command and
sends a response to the host device. If the MLC is unable to execute the
command because the command is invalid or it contains invalid parameters, it
returns an error response to the host.
The error response codes and their descriptions are as follows:
E10 – Invalid command
E14 – Invalid for this configuration
Using the command/response tables
The command/response tables below and on the following pages list valid
command ASCII codes, the MLC’s responses to the host, and a description of the
command’s function or the results of executing the command. Upper and lower
case characters may be used interchangeably in the command field.
The ASCII to HEX conversion table below is for use with the
command/response tables.
ASCII to HEX Conversion Table
•
ASCII to Hex conversion table