plasa09 art-net released to website - artistic licence ar… · •member of dmx512 design group...

Art‐Net

How it works and its benefits in large scale installations.

Wayne HowellCreative Director

Artistic Licence

Art‐Net at PLASA09 by Wayne Howell

Artistic Licence

Wayne Howell

• Creative Director Artistic Licence

• Inventor of Art‐Net

• Active in ESTA Standards Programme

• Member of DMX512 design group

• Member of RDM design group


Agenda

• One hour session

• The history

• What is Art‐Net?

• How does Art‐Net work?

• Large scale applications

• Good network design


The History of Art‐Net


Audience Participation

But first audience participation time:

• What do you do?

– End User

– Manufacturer

– Distributer

– Developer

– Specifier


Audience Participation

• Who uses DMX regularly?

• Who uses Ethernet regularly?

• Who uses Art‐Net regularly?

• Who understands the term “Collision Domain”?

• Who cares whether they understand the term “Collision Domain”?


History

• 30 years ago

– Analogue multicore• 25 years ago

– Analogue multiplex• 20 years ago

– DMX512• 15 years ago

– DMX512 multicore

• 10 years ago

– Networking


Analogue Multicore

• Single wire = Single channel

• Multiple formats:– 0 to +5V

– 0 to ‐12V

– 0 to +10V

• Incompatible connectors:– DB25

– DB37

– Socapex 37Art‐Net at PLASA09 by Wayne Howell

Analogue Multiplex

• Single wire = Multiple channel

• Driven by theatre industry

• Multiple formats:

– AMX192

– D54

– S20


Digital Multiplex

• Single wire = Multiple channel

• Longer cable length

• Higher channel count

• Improved reliability

• Proprietary solutions

• Compatibility issues


DMX512

• Developed by USITT

• Managed by ESTA

• 512 channels per cable

• 300m maximum distance

• 32 Fixtures per cable

• Standardised across manufacturers


Networking

• LED technology increases channel thirst exponentially

• 512 channels no longer adequate

• Network technology offers the solution


Early Protocols

• Strand ShowNet

• ETC ETCNet

• Other proprietary protocols.

• Cast WYSIWYG

• Art‐Net


Art‐Net

• Conceived as a DMX Multicore

• Solved a problem

• Published on a royalty free basis

• Widespread industry support


EthernetWhy use for Lighting?

• Existing network protocols• Low cost Cat5 cable• Better contractor understanding

• Higher bandwidth• Existing building networks can be used



• Progression path to faster systems

• Leverage existing IT market technology

• A 10BaseT network cable can carry approximately 40 times more data than a DMX cable



• Ethernet can be transmitted over a variety of media:– WiFi– LASER– Telephones– ADSL– ISDN– Fibre optic



• All modern ethernet wiring is star format

• Increases system reliability compared to ‘Ring’ or ‘Loop Through’

• Better configurabilityArt‐Net at PLASA09 by Wayne Howell

EthernetThe down side

• Star wiring topology makes touring applications more complex

• Cable distance limited to 100m

• Higher knowledge levels required by designers & installers


Art‐Net The Benefits

• Remote patching of all DMX512 inputs and outputs

• Allows DMX512 data to be merged in either LTP or HTP

• Simple to implement new features – e.g. remote control of the lighting console


Art‐Net The Benefits

• Supports RDM standard • Macro triggering• Open access to protocol• Free and public domain resources such as:– DMX‐Workshop– WireShark– Net‐View allows monitoring via a radio link


Is DMX Dead?

• No!• Art‐Net will work together with DMX

• Ethernet would not work in all applications

• Commercial resistance to change


A Networking Primer


Ethernet How To Use It

• Ethernet is less forgiving than DMX512

• Follow the rules

• Use the correct cable

• Use the correct connectors


Ethernet Media Types

• Media Type is the physical entity used to carry the data. Copper or Fibre.– Cat1 to Cat4 not important– Cat5: 10BaseT & 100BaseT– Cat5e: Better Cat5– Cat6: Gigabit (1000BaseT)– Cat7: 10 Gigabit


Ethernet Physical Layer

• Physical Layer means the network electrical connection

• Example: 10BaseT– T = Twisted Pair

– Base = Baseband

– 10 = Multiply by 106 for bps



• 10Base2

• Old style coaxial cable– Speed: 10 Meg

– Max Cable: 185m

– Topology: Ring (Delta)

– Band: Baseband

• No longer in widespread use



• 10BaseT• Uses UTP Cat5 cable

– Speed: 10 Meg– Max Cable: 100m– Topology: Star– Band: Baseband

• Widely used in Entertainment Networks – particularly for end data delivery



• 100BaseT (Fast Ethernet)• Uses UTP Cat5 cable


• Widely used in Entertainment Networks – particularly for console communications.



• 100BaseFx• Uses fibre optic cable

– Speed: 100 Meg– Max Cable Single Mode: 10km– Max Cable Multimode: 2km– Topology: Star– Band: Baseband

• Widely used to back bones in Entertainment Technology



• 1000BaseT (Gigabit)• Uses UTP Cat6 cable


• Widely used video streaming applications.


Ethernet The Cable

• Coaxial

• UTP

• STP

• Fibre– Single Mode

– Multi Mode


Ethernet The Cable

• Solid Conductor:– Installation

– 100m for 10BaseT

• Stranded or Patch– Portable

– Patch Bay

– 80m for 10BaseT


Ethernet The Connector

• RJ45– Screened

– Wire Type

– Cat Rating

– Industrial – (Neutrik)

– Waterproof –(Woodhouse)


Ethernet Wiring Schemes

• MDI– Used on all Nodes

– 4 wires used for 10BaseT & 100BaseTX

– 8 wires used for 100BaseT4 & Gigabit


MDI

Pin Name Purpose

1 Tx+ Transmit Data

2 Tx- Transmit Data

3 Rx+ Receive Data

4 BD3+ Not used in 10BaseT

5 BD3- Not used in 10BaseT

6 Rx- Receive Data




• MDI‐X– Used on all Hubs, Switches & Routers

– MDI‐X is MDI with built in cross over cable


MDI-X

Pin Name Purpose

1 Rx+ Receive Data

2 Rx- Receive Data

3 Tx+ Transmit Data



6 Tx- Transmit Data




• Auto‐MDI– Many products now automatically detect and correct MDI / MDI‐X wiring errors

– Hubs usually have an ‘UpLink’ port that has MDI wiring



• Auto‐Polarity– Auto‐Polarity is different to Auto‐MDI

– It corrects for a mis‐wired pair.


Ethernet Straight or Cross?

• Straight Cable– Hub to Node– MDI to MDI‐X

• Cross Cable– Node to Node– Hub to Hub– MDI to MDI– MDI‐X to MDI‐X


Ethernet Cable Colours

• Colours:– Yellow = Straight

– Red = Cross

– Green = DMX


Ethernet Data Distribution

• Hub:– Just an electrical repeater

– Analogous to DMX Splitter

– Follow 5‐4‐3 Rule


Ethernet Data Distribution

• Switch (Bridge):– Intelligent repeater

– Retransmits data

– Terminates Collision Domain

– No 5‐4‐3 Rule


Ethernet Hub or Switch?

• Hub:– Faster– No configuration– No broadcast blocking

• Switch:– Bandwidth management

– No 5‐4‐3


?

How does Art‐Net work?


Under the hood

The ArtDmx Packet• Contains 512 bytes of data from DMX512.

• The destination Universe

• A few control fields for error checking


Broad – Uni‐Multi ‐Casting

• Broadcast– One to All

• Unicast– One to One

• Multicast– One to Many


Broadcasting

• Original concept of “Digital Multicore”used Broadcast

• Benefit of simplicity for users

• Burns network bandwidth


Art‐Net II

• Needed as universe count increased.

• Uses simple algorithm to Unicast

• Fully compatible with Art‐Net I


Polling

• ArtPoll – Console broadcasts “Who is there?”

• ArtPollReply– Dimmers and lamps reply with their information and status


Sensing

• ArtTod – End devices broadcast their list of connected RDM devices

• ArtRdm– Art‐Net is used as a carrier to route RDM messages over the network


What is RDM?

• RDM is a new way of sending data in two directions over the DMX cable

• Set the start address or personality remotely

• Retrieve sensors and status


How does it work?

• It uses pins 2 & 3 just like DMX512

• The direction of the DMX cable occasionally switches to let data return


Conclusions

Art‐Net leverages the following technologies to provide a public and royalty free solution to today’s lighting control needs:

• DMX512

• RDM

• Ethernet

• TCP/IP


Large Scale Applications


• Colour Changing Fixtures

• Control System

• Installation

• Training

• Programming

• Maintenance

Art-Net at PLASA09 by Wayne Howell

Broadgate

• Colour Change

• In‐Ground

• Waterproof

• Low Power

• Low Maintenance

• Long Life

• Remote ConfiguredArt-Net at PLASA09 by Wayne Howell

The Fixture

• Line Voltage

• Temperature

• Water

• Start address

• Lamp on time

• Fixture on time

• FirmwareArt-Net at PLASA09 by Wayne Howell

The Sensors


The Network

Colour-Tramp PC Ethernet

Iso-spit #1

DMX-Cat #1

Ether-Lynx #1

Ether-Lynx #2

Ethernet Hub Ethernet

DM

X U

nive

rse

1

U1-105-122

U1-111-122

U1-117-122

U1-122-123

U1-105-120

U1-111-120

U1-117-120

U1-123-122

U1-105-118

U1-111-118

Iso-spit #2

DMX-Cat #2

U1-117-118

U1-123-120

U1-105-116

U1-111-116

U1-117-116

U1-123-118

U1-105-114

U1-111-114

U1-117-114

Iso-spit #3

DMX-Cat #3

U2-123-116

U2-105-112

U2-111-112

U2-117-112

U2-123-114

U2-105-110

U2-111-110

U2-117-110

U2-123-112

U2-105-108

Iso-spit #4

DMX-Cat #4

U2-111-108

U2-117-108

U2-123-110

U2-105-106

U2-111-106

U2-117-106

U2-123-108

U2-105-104

U2-111-104

DM

X U

nive

rse

2

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Still confused about ethernet?

• Rock Solid Ethernet about ethernet in entertainment technology

• Written by Artistic’s Wayne Howell

• Available from ET Press

• See us on Stand E32Art‐Net at PLASA09 by Wayne Howell

Art‐Net

Visit Artistic Licence on Stand E32

Wayne HowellCreative Director

Artistic Licence


Artistic Licence

plasa09 art-net released to website - artistic licence ar… · •member of dmx512 design group...

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