Extron Electronics MLC 206 AAP EC User Guide - Manual (Page 30)

Operation, cont’d
MediaLink Controllers • Operation 3-4
pressing the button when the MLC is in the secondary mode or
via the Windows-based software.
The corresponding label flashes when a command associated with a
button is executed.
Relay triggering — A relay can be associated with a button. The relay
can be triggered by pressing a button only when the MLC is in
primary mode, or it can be triggered via the control software.
See pages 2-8, 4-3, 4-5, 4-10, 4-12, 4-22, and the note on page 4-18
for details.
If an input selection button is not part of the switching rotation
(does not cause input switching), the corresponding label flashes
when a momentary relay associated with a button is triggered, and
it lights steadily while a latching relay associated with the button
is active.
Secondary mode selection — If buttons 3 and 4 are simultaneously
pressed for three seconds, the MLC enters the secondary mode.
In this mode, input switching is temporarily disabled, and the
input selection buttons can be used to send various user-defined
RS-232 or IR commands to the projector (or other equipment).
Commands for special projector functions such as autosync,
focus, and zoom can be assigned to an input button and
executed when secondary mode is active.
While the secondary mode is active, the Display Power LED
blinks about twice per second. If a button is pressed in
secondary mode, the button’s label flashes briefly. Relays
cannot be triggered via the front panel when secondary mode is
active, only via the software.
To exit secondary mode, press and hold buttons 3 and 4, or
allow the MLC to time out to primary mode.
2 Display Power button and LED — The Display Power button has two blocks
of memory that can be programmed to store projector power-on and power-
off commands.
Basic operation — You must program the commands (see chapter four)
during MLC setup before this button will control the projector. To turn
the projector’s power on/off:
1. Press the Display Power button to turn the projector’s power on.
The MLC sends an RS-232 or IR power-on command to the
projector, the Display Power LED blinks for the period set for
power-up delay (refer to the Room & Misc. Options screen of the
control software for details), and then the LED remains steadily lit.
2. Once the projector is on, press and hold the Display Power button
for two seconds to turn the projector’s power off. The MLC sends a
power-off command to the projector, the LED blinks for the time set
for power-down delay, then the LED turns off. During the power-
down period, the MLC resends the power-off command.
The two-second press and hold period for Display Power Off can
be changed, via HyperTerminal only, to zero seconds by using a
special command (22 *
X? #, where X? = 0 for a two-second delay,
or X? = 1 for no delay). See page 4-7.
The relays discussed in “Rear/bottom panel cable connections” in
chapter two can be turned on/off when the Display Power button is
pressed. Via the control software, each relay can also be associated with