Extron electronic MLC 52 manual Serial Communication, cont’d

Serial Communication, cont’d

Volume mode (green): This mode is available only on the standard (not VC) MLC model, and only for the two buttons that are (by default) labeled Vol Up and Vol Dn. When an RS-232 driver that contains a volume table is part of the configuration, pressing a button in volume mode accesses the driver’s volume table. Each press of the button raises or lowers the volume of the display device by the amount specified in the volume table. When in volume mode, the button labeled Vol Up always increases the volume; Vol Dn always lowers it.

If you select volume mode for one of these two buttons, the other button is also placed in volume mode.

If no RS-232 driver has been added, or if the current RS-232 driver contains no volume table, selecting volume mode is the same as selecting single switch mode.

Power mode (yellow): The two Display buttons at the top of the front panel, labeled by default “On” and “Off,” are permanently fixed in power mode. When you select one of these buttons, the only setting you can change in the Button Settings section is the Button Text. Power mode is available for only these two Display buttons.

In power mode, the two buttons are mutually exclusive; if you press one on the front panel, the other one becomes unlit. In addition, if you have entered a number on the Display Power Settings tab to indicate the seconds that the display device delays when powering up and/or down, pressing these buttons causes them to blink for the duration of the specified delay. (See “Entering display device power settings” in the next section.)

•Button Mode — When multiple commands are programmed on a button, select the mode in which the commands are performed:

Toggle mode — When pressed, the button executes only one command. The first time it is pressed, it executes the command that was programmed to its first memory block (the first command listed for that button in the Current Button field). The second time the button is pressed, the command in the second memory block is executed, and so on.

In toggle mode, the commands are always executed in the order that they are programmed in the memory blocks and listed in the Current Button field. For example, if you want to perform the command in memory block 3 of the selected button, you must press the button three times; and the commands in memory blocks 1 and 2 are always performed before command 3.

However long the delay between button presses, the commands are always executed in the programmed order, unless another button is pressed in between. If this occurs, the button returns to command 1.

Macro mode — When pressed, the button executes all the commands programmed to its memory blocks, in the order they are listed in the Current Button field. There is a 2 second delay between command executions.

5-36 MLC 52 Series MediaLink Controllers • Serial Communication