Posted 19 December 2012 - 05:47 PM
Just think of DMX lights as being a row of houses in a street. Each House, or light in this case has its own individual number, so that it keeps its own identity.
Then think of the DMX controller as being like the postman, and that he only delivers mail to the houses to which it is addressed. He does this by reading the number on the letter and then delivers it to the correct address. If the house has no mail, it gets no delivery as the postman will only direct mail to where he's told to do so.
In this case each light 'address' number, is configured by using a row of DIL / DIP switches. The number which the light is assigned is manually configured at the time of installation simply by the moving of one or more switches (which are numbered 1,2,4,8,16,32 etc)
Giving a light an Address of 1 or 2 or 4 is easy, simply move the switch numbered 1,2 or 4 and the light will be assigned that number. However the consecutive numbers in between require two or more switches to be selected.
A light would be given the ID Address of '3' simply by moving both of the 1 & 2 switches to the 'on' position
Another light could be given the ID address of '6' by moving the '4' and '2' switches to the 'on' position
Another unit could be given the ID address of '20' by moving the '16' and '4' switches to the 'on' position
And so on. In other words the light id number is selected by adding together the numbers of the switches which are moved to the 'on' position.
Its generally good practice that the light id's are assigned consecutively, so if you had 4 lights, they would be numbered 1,2,3 & 4 - if you had 12 lights they would be assigned 1,2,3,4,5,6,7,8,9,10,11 & 12 and so on, with each ID being individually addressed by moving the relevant combination of switches to create the ID number.
The lights can then be chained together, usually using 3 pin XLR plugs & sockets and connected to a controller. Even though the lights are all connected in a chain, each light is individually 'coded' to the corresponding channel on the DMX controller by way of its DIP switch assigned number, and so if you had assigned number '1' to a light, then only this light would respond when '1' is selected on the controller. Selecting '2' on the controller would mean that light number '2' would respond to the commands on the controller and so on.
Thus it is possible to have light 1 showing green, whilst light 2 shows purple, light three shows 'red' and so on, or of course you could select 1 to 4 on the controller and so all 4 lights would then synchronise together, following the same commands as entered into the controller.
"The voice of the devil is heard in our land"
'War doesn't determine who is right, war determines who is left, and you wont win this war.'