Hello i'm just learning about DMX communication and i'm curious about what looks to me like a non sequitor in the design of the protocol. a slot value is defined as a single # from 0 - 255. the simplest slave device implementation, i presume, would consist of a circuit that uses the slot value to control the voltage (a PWM output) going to a light.
it seems to me that, because of the redundancy of the protocol (meaning that a given device is often recieving the same number repeatedly), that it would be smart to designate a NULL value (either 0 or 255) that a slave device would ignore. certainly the engineers who designed the protocol thought of that and why did they not make it part of the specification?
does anyone know about this?