Programming
17
XB-DMX512 DMX512 Interface
Group Buffer Commands (Cont.)
Command Description
GT
Sets the current ramp rate for one or
more groups in tenths of a second.
This affects any future group up (‘GU’), group down (‘GD’), or group
direct ramp (‘GR’) commands. The specified time determines how
long it takes to go full range. If the group is proportional then
Individual Output rates will be proportional.
Optionally, the up (‘U’) or down (‘D’) times may be specified. Without
an U or D, both up and down ramp rates are set the same. Ramp
rates determine how long the group will take to ramp from 0% to
100% (and 100% to 0%).
If, for example, there is a ramp time of 10 seconds, and the level is
currently at 50%, it will take only 5 seconds to ramp to either 0% or
100%. 100% for proportional (‘GP’) and fixed (‘GF’) groups is the
maximum level in the group for each channel that is not necessarily
fully at 100% (255).
Syntax:
"'GT<list of groups>R<time>{U or D}'"
Variables:
{}-Parameters in commands that are optional.
Example:
SEND_COMMAND DMX,'GT1R5'
Sets Group 1 to ramp rate to 0.5 second both up and down.
SEND_COMMAND DMX,'GT1-2R50'
Sets the up and down ramp times for Groups 1 and 2 to 5 seconds.
SEND_COMMAND DMX,'GT3,5-8R35U'
Sets the up ramp time for groups 3 and 5 through 8 to 3.5 seconds.
SEND_COMMAND DMX,'GT10R5D'
Sets the down ramp time for Group 10 to 0.5 seconds.
GU
Ramps up one or more groups at the
current ramp rate set by the ‘GT’
command.
The group stop (‘GS’), group ramp down (‘GD’), or group direct ramp
command (‘GR’) will interrupt this command. It is not possible to use
this command on groups that are connected to an Axcess level or to a
DMX input.
Syntax:
"'GU<list of groups>'"
The list can be single groups and/or ranges of groups separated by
commas. If this command is sent for multiple groups, only those that
are connected to an Axcess level or DMX input will ramp.
Example:
SEND_COMMAND DMX,'GU1,3-4'
Starts a ramp up on groups 1, 3, and 4.
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