MLC 104 IP Plus Series • SIS
™
Programming and Control
70
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 a
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.
Chn
X!]
(where
X!
is the input number)
The unit sends this response when an input is switched.
Vol
X*]
(where
X*
is the volume step number)
The unit sends this response when the volume knob is rotated.
(c) Copyright 2008, Extron Electronics, MLC 104 IP PLUS, Vx.xx, 60-818-00
]
Day, DD Mon YYYY HH:MM:SS
]
V
x.xx
is the firmware version number.
Example:
(c) Copyright 2008, Extron Electronics, MLC 104 IP PLUS, V1.03, 60-818-00
Tue, 30 Apr 2017 14:34:31
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 terminal emulation program such as DataViewer or HyperTerminal is
open), the connected unit sends these messages via RS-232 when it is first powered
on.
•
If the MLC is on, it sends the boot and copyright messages when you first open a Telnet
connection to the MLC. The day of the week, date, and time are displayed if the unit is
connected via Telnet, but not via RS-232. If you use a Telnet connection, the copyright
message, date, and time may be followed by a password prompt.
Additional messages may be sent by the MLC in response to front panel selections and
volume adjustments and when scripts are executed during scheduled events.
Password Information
The “
]
Password:
” prompt requires a password (administrator level or user level) followed
by a carriage return. The prompt is repeated if the correct password is not entered.
If the correct password is entered, the unit responds with “
]
Login Administrator
]
”,
“*****
]
Login Administrator
]
”, or “****
]
Login User
]
”, depending on the
password entered. If passwords are the same for both administrator and user, the unit
defaults to administrator privileges.
Summary of Contents for MLC 104 IP Plus Series
Page 6: ......