TC Electronic DB8 MKII - Manual (Page 33)

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frame - sysTem -maIn -GpI
operation
DB4 and DB8 GPI Specification
DB4 and DB8 offers a GPI input for remote switching between Scenes (all Engine Presets plus Routing). The input can
be used for daily operation, or for backup and redundancy purposes. It allows change between 2, 4 or 8 presets using
just one connection. GPI functionality includes two flexible modes (“3 presets” and “7 presets”) where normal editing of
presets is allowed unless the GPI input is moved away from its idle state. These modes are typically be used for putting
the machine into a defined state, for instance for backup or emmergency announcements overruling normal operation. GPI
switching is “intelligent” and performed without audio interruption as long as the same algorithms are used in Engine 1-4,
and only parameters are changed.
Basic operation
GPI functions are accessed from the System/Main/GPI page in TC Icon.
Enable Recall
Off
2 Presets
3 Presets
4 Presets
7 Presets
8 Presets
Notes
Make sure this state is selected, if GPI recall is not being used.
User Scene 0 or 1 is permanently recalled.
Note: Switching to this mode will instantly perform a Scene Recall,
even if no connections are made to the GPI input.
As long as the GPI input is idle (+5V), GPI recall is inactive. In idle
mode, the machine can be normally controlled from Icon, or using
the serial data input.If active GPI windows 1, 2 or 3 are selected,
the corresponding Scene is recalled, and the serial data control
input is disabled.This GPI mode is suitable for Backup and Alarm
messaging operation.
User Scene 0, 1, 2 or 3 is permanently recalled. Note: Switching
to this mode will instantly perform a Scene Recall, even if no
connections are made to the GPI input.
As long as the GPI input is idle (+5V), GPI recall is inactive. In
idle mode, the machine can be normally controlled from Icon, or
using the serial data input.If active GPI windows 1-7 are selected,
the corresponding Scene is recalled, and the serial data control
input is disabled.This GPI mode is suitable for Backup and Alarm
messaging operation.
User Scene 0, 1, 2, 3, 4, 5, 6 or 7 is permanently recalled.
Note: Switching to this mode will instantly perform a Scene Recall,
even if no connections are made to the GPI input.
The Enable Recall parameter can be set to Off (GPI
recall disabled), 2, 3, 4, 7 and 8 presets.
Presets are selected as a state condition, i.e. presenting
the GPI input a permanent voltage signifying a specific
preset.
See table below for description of “Enable Recall” set-
tings. NOTE: Moving “Enable Recall” away from the Off
position immediately results in a Scene preset recall, and
locks the machine from editing of parameters or recall of
other presets.
The “Select Between Scenes” parameter sets the preset
range from which presets are recalled based on GPI
commands. For instance, if set to “10-19”, GPI com-
mands recall a User Scene preset in the range 10-19. If
“Enable Recall” is set to “4 presets”, the GPI input thus
selects between User Scene preset 10, 11, 12 and 13.