CHAPTER 3
Menu System
SolaWash 19 LED User Manual
23
Determining DMX Start Channel Assignment
There are 512 available channels on each DMX link divided among all the devices in a particular
link. A fixture must have a unique Start channel number in order to respond independently to
controller commands.
To determine each fixture’s DMX start channel in a link, identify the channel range of every fixture
on the link. Channel range is the number of consecutive channels a fixture requires. Each
SolaWash 19 LED fixture running Standard Protocol requires a block of 21 consecutive channels
on a 512-Channel DMX link. The Start channel is the first number of a fixture’s channel range.
When setting the Start channel on a fixture, remember:
• A fixture’s physical location on the link does not have to coincide with the order of channel
range assignments in the link.
• The fixture’s channel range must not overlap any other device’s channel range on the link.
When two devices on the same DMX link have overlapping channel ranges, one or both
devices will be disabled or behave erratically. The single exception would be if two or more
fixtures need to respond to controller commands in exactly the same way. In that case, those
fixtures must be the same type (for example two SolaWash 19 LED fixtures) with the same
User Mode setting and must share the entire channel range.
The notes in the following table show the various considerations in determining valid Start
Channels for fixtures on a 512 DMX link.
Fixture
Rig
Position
Fixture
Type
DMX
Channel
Footprint
DMX
Start
Channel
Channel
Range
Notes
First
SolaWash 19
LED in Standard
User Mode
21 channels
C001
1-21
The Start channel is the first channel
in a consecutive block of channels
assigned to a fixture.
Third
SolaWash 19
LED in Reduced
User Mode
19 channels
C029
29-47
Fixture can be assigned the second
block of DMX channels without being
the second fixture on the rig.
Second
Technospot
37 channels
C079
79-116
Avoid overlapping channels with other
fixtures
Fourth
Studio Spot
18 channels
C121
121-138
Every channel in the link does not need
to be assigned.