Extron Electronics MLC 104 SIS Programming and Control - Manual (Page 2)

MLC 104 Series • SIS ™ Programming and Control 5-2
SIS ™ Programming and Control
PRELIMINAR
Y
The MLC 104 Series controller can be remotely set up and controlled via a host
computer or other device (such as a control system) attached to the rear panel
Config/RS-232 port or LAN port, or the front panel Config port.
The MLC 104 or MLC 104 IP must be configured before use. As shipped the
controller can trigger basic input switching but cannot control any other devices
before being configured.
The MLC can be set up and controlled by using Extron’s Simple Instruction Set
(SIS) commands or the Extron Global Configurator software (version 2.0 or higher),
and both of those methods can be accessed via RS-232 or Ethernet LAN connection.
See chapter 2 for pin assignments and other details on the configuration and
control ports. For information on the software and the MLC’s embedded Web
pages, see chapter four.
MLC’s RS-232 protocol:
• 38400 baud
• 8 data bits
• 1 stop bit
• no parity
• no flow control
Both configuration ports require 38400 baud communication. This is a higher
speed than many other Extron products use. The Global Configurator (version
2.0 or higher) software or MLC 226/104 control software automatically sets
the connection for the appropriate speed. If using HyperTerminal or a similar
application, make sure the PC or control system connected to these ports is set
for 38400 baud.
LAN port defaults:
• MLC’s IP address: 192.168.254.254
• gateway’s IP address: 0.0.0.0
• subnet mask: 255.255.0.0
• DHCP: off
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 MLC 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
If you are communicating with the MLC via RS-232 or via a verbose Telnet
connection, when a local event such as a 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 2004, Extron Electronics, MLC 104 IP, Vx.xx
Day, DD Mon YYYY HH:MM:SS
Vx.xx is the firmware version number.
The MLC sends the boot and copyright messages under the following
circumstances:
• If the MLC is off and an RS-232 connection is already set up (the PC is cabled to
the MLC and a serial communication program such as HyperTerminal is open),
the connected MLC sends these messages via RS-232 when it is first powered on.