I would like to ask you some questions about casDMX “copy slot” parameter.
I know that “copy slot” parameter allows retransmitting the information contained in a block of X addresses, starting with the “DMX start address”:
(See attached image)
Anyway, I don’t see the advantage or the purpose of using “copy slot” parameter. I mean that if you have 4 RGBW devices you can use the same starting address for all of them (set by selectors or switches) instead of using different start address for each device and use “copy slot” parameter.
Do you know some examples where “copy slot” parameter would be really useful?
This is a feature for linear lights where the DMX address is automatically incremented inside the driver. This allows for all of the lights then to have the same output, even though every fixture segment is at a different start address.
DMX In -> Fixture 1 -> Fixture 2 -> Fixture 3
DMX Address 1 5 9 etc.
Since you cannot connect to the internal drivers inside the fixture, they repeat the DMX stream, but strip off their channels, so that all of the drivers inside are listening to DMX address 1. The first driver removes the first 4 channels of DMX universe data, then re-transmit that data to next driver (which is internally set to 1) so that it now is listening to address 5, and so on.
We have quite a few customers that use this feature since they purchase Chinese linear fixtures that are prebuilt, and this way they can use the DMX stream to do chases in a per-fixture method. Normally these are at a distance, like on a building, so a pixel of light is one segment of driver/LEDs.
