Appendix - Cameo XNODE 4 User Manual

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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pying and recording, without the prior written permission of Adam Hall Group.
The information in this documentation is supplied without warranty of any kind, either directly or indirectly, and is subject to change without
prior written notice.
Adam Hall Group, its employees or appointed representatives will not be responsible for any damages to software, hardware, or data, arising
as a direct or indirect result of the product(s) mentioned herein.
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