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SIS Control
The MLC can be remotely controlled via a host computer or other control device that is
attached to the MLC rear panel Host/Config port. You can issue Simple Instruction Set (SIS)
commands to the MLC via the RS-232 or USB interface of your computer or control device
with a communication software program such as Extron DataViewer or HyperTerminal. This
section contains a list of the SIS commands available for the MLC and describes procedures
for issuing them. The following topics are covered:
• Host-to-Controller Communications
• Using the Command and Response Table
• Command and Response Table for SIS Commands
Host-to-Controller Communications
SIS commands consist of strings 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.
Most responses from the MLC to the host end with a carriage return and a line feed
(CR/LF =
]
), which signals the end of the response character string.
Controller-initiated Messages
When a local event such as a front panel button press takes place, the MLC responds by
sending a message to the host, indicating what selection was entered. No response is
required from the host.
The MLC sends the following copyright message only when it first powers on.
(c) Copyright 20nn, Extron Electronics, MLC nn, vn.nn, 60-nnnn-nn
where MLC nn is the model name, vn.nn is the firmware version number and 60-nnnn-nn
is the model number.
This message does not appear with a USB connection.
Error Responses
If the MLC is unable to execute a command it receives because the command is invalid
or contains invalid parameters, the controller returns an error response to the host. This
response consists of the letter E followed by a number and a carriage return with a line
feed. The following error response codes can be returned:
E10 – Invalid command or parameter
E13 – Invalid value (out of range)
E14 – Not valid for this configuration
E22 – Busy
MLC 60 Series MediaLink Controllers • SIS Control 54