JL Audio MCS-3800 - Manual (Page 72)

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Manually Exiting Special Mode
A host software system, engineered to support the MCS
Controller using Special Mode, will send a command which
switches the unit into Special Mode.
At this point, the MCS is no longer user-programmable.
The user may choose, however, to manually exit the Special
Mode and return to User Assignable mode, without having to
turn the hardware off and on.
This is done by entering Utility Mode by pressing Shift and
Assign. Above the first encoder is the word MODE. The
encoder is turned to select either User or Host.
Selecting User returns the unit to User Assignable Mode.
Selecting Host returns the unit to the Special Mode.
Note that this function is only available if the MCS has already
been switched into Special Mode by an external host system.
If the unit has not received any command from a Host system,
since its last power-up, then this feature is not accessible.
User Assignable vs. Pre-Defined Functionality
User Assignable Mode means the unit is User Assignable:
The MCS Controller's MIDI Commands sent are chosen by the
user. You can add a 422 card, and also have 9 Pin control, this
relates to the Transports, Jog/Shuttle, and Locates. You can
also add an ADB card, (Apple Desktop Bus) for Macintosh, and
again the controls are fully assignable.
Special Mode means the unit has a Pre-Defined Functionality:
When communicating via MIDI, RS422, and RS485, the people
who designed your audio and video host system decided how
the MCS Controller behaves. They take over all the controls
and displays, and determine how each control will behave.
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Maximum (or Velocity)
Maximum controller or note velocity value.
If the switch is Latch Off (see below), this is the value sent
when the switch is pressed.
If the switch is Latch On (see below), this is the value sent
every other press, when the LED turns On.
Group
The selected control that you are currently editing can be made
a group member.
By rotating the encoder under the word Group, the LCD
prompts you to select which button will be the Master for that
control.
Latch
Turning Latch off or on allows the user to set the behavior or
"action" of a switch.
When Latch is off, the switch is said to be "momentary". Its
only on for as long as you hold down the button.
When Latch is on, the switch is said to be "push-on, push on".
You push it once to turn it on. Push it again to turn it off.