LED Behavior in Special Mode
The LED can appear to behave either momentary, or latched. Momentary means the LED is lit only while the button is pressed. It turns off when you release the button. Latched means that the LED turns on with the first button press, and then turns off with the second button press. Alternately, the LED can flash, or do nothing. It is up to the host system.
The most important thing to understand about the Special Mode, and the fact that the Special Mode turns Local Control Off, is that two way communication with the host system is required for a special mode to operate. In other words, special mode will not work unless there are (in the case of MIDI I/O) two MIDI cables connected, or a 422 connection.
If only one way communication is established, and the MCS is in Special Mode, then it is possible that the unit will appear to not work. Either the displays will light, but the MCS will not control the software, or, the MCS will control the software but none of the LEDs or LCD will light.
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