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DMX512-A
From wiki.openlighting.org
Revision as of 06:40, 28 January 2007 by Beier (talk | contribs) (Dmx signals moved to DMX Signals: Corrected the case of the lettets)
A Universe contains 512 addresses and a single DMX line (cable) can only transmit one universe. I.e. a controller with two universes need two DMX lines (daisy chains including splitters). A uniververse is normally thought of as an address space (in the controller), the cables that transmits it and the equipment that receives it.
- The DMX signal is made up of a sequence which is sent over and over again (to increase robustness).
- The content is a "start byte" and 512 values, one value for every address.
- The address number is not sent over the lines, so the receiver must count the values from the start of the sequence to find the wanted value.
- A receiver must be set or programmed to an address it listens to. If a receiver listens to multiple addresses, the set one is the first.
- Multiple receiver can listen to the same address - the DMX system does not care.
- It is up to the controller/transmitter to decide how many addresses that should receive a value. Fever addresses means faster cycles.
Source: Wikipedia
