Appendix - Cameo XNODE 4 Manuel D'utilisation

APPENDIX

REPRESENTATIONS OF ART-NET PORT ADDRESSES
According to the Art-Net 3 specification, the address of an Art-Net port consists of three parts: The Art-Net net, sub-net and universe
number. The Art-Net universe and sub-net number both have a value between 0 and 15 (4 bits). Many controllers combine these values to
the sub-uni number, resulting in a value between 0 and 255 (8 bits), with the sub-net part occupying the more significant digits. Thus, the
sub-uni can be calculated with the formula 16 x sub-net + universe = sub-uni.
The Art-Net net number was added in Art-Net 3 and has a value between 0 and 127 (7 bits). So, when working with controllers using Art-Net
I or Art-Net II, the Art-Net net must be set to 0.
The Art-Net net, sub-net and universe can be combined to a 15-bit port address with values from 0 to 32767, as shown below.
Bit Digit
Subdivided Representation
Alternative Representation
15-bit Port Address Rep.
For the instances where the Art-Net net number is 0, the 15-bit port address is equivalent to the sub-uni. The table below gives an overview
of the entire Art-Net 3 address space and how it is converted to a 15-bit port address.
Net (0 - 127)
0
0
0
0
0
0
0
0
0
1
1
127
127
z
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21.08.2020
28
14 13 12 11
Net (0 - 127)
Net (0 - 127)
Art-Net Address
Sub-Net (0 - 15)
0
0
0
1
1
1
2
2
15
0
0
15
15
y
10 9 8 7 6
Sub-Net (0 - 15)
Sub-Uni (0 – 255)
(0 – 32767)
15-bit Port Address
Universe (0 - 15)
0
1
15
0
1
15
0
1
15
0
1
14
15
x
5 4 3 2 1
Universe (0 - 15)
0
1
15
16
17
31
32
33
255
256
257
32766
32767
z * 256 + y * 16 + x
0