Extron Electronics MLC 104 Plus Series - Manual (Page 67)

4-3 MLC 104 Plus Series • SIS Programming and Control
PRELIMINAR
Y
• 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 HyperTerminal
is open), the connected unit sends these messages via RS-232 when it is first
powered on.
• If an MLC IP model is on, it sends the boot and copyright messages when you
first open a Telnet connection to the MLC. You can see the day of the week, date,
and time if the MLC is connected via Telnet, but not via RS-232. If you are using
a Telnet connection, the copyright message, date, and time are 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 (IP models)
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 ] ”
or “ ] Login User ] ”, depending on the password entered. If passwords are the same
for both administrator and user, the unit will default to administrator privileges.
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:
E01 – Invalid input channel number (the number is too large)
E12 – Invalid port number
E13 – Invalid value (the number is out of range/too large)
E14 – Not valid for this configuration
E17 – System timed out
E22 – Busy
E24 – Privilege violation
E25 – Device is not present
E26 – Maximum number of connections has been exceeded
E27 – Invalid event number
E28 – Bad filename or file not found
E30 – Hardware failure (followed by colon and descriptor number) (This is an
unsolicited response.)
Error response references
The following superscripted numbers are used within the command descriptions
on the following pages to identify commands that may respond as shown:
14 = Commands that give an E14 (not valid for this configuration) response if the
unit’s current configuration doesn’t support that command.
22 = Commands that yield an E22 (busy) response.
24 = Commands that give an E24 (privilege violation) response if you are not logged
in at the administrator level.
27 = Commands that may yield an E27 (invalid event number) response.
28 = Commands that may give an E28 (file not found) response.