(Using DMX States, and Using DMX Effects should be subpages or on this page)
Once you have activated DMX within the Project Settings panel, you can then use DMX channels.
N.B. You need a COGS Plus licence to connect any DMX hardware.
The DMX Live tab gives you the ability name & change the values of your DMX channels on the fly.
Adding a DMX channel is not like adding other channels within COGS. You are given 512 (one universe) channels from the start, and you can name the channels to whatever you want. However, you cannot re-patch channels to different channel numbers. The order of the channels is absolute, and this should be reflected in how you address and connect up your hardware.
You can create names and add all your DMX actions before you connect any DMX hardware.
You can change individual DMX values in Behaviours by using the Set DMX Values action.
There is no way of correctly simulating the DMX channels within COGS. You can only understand what each channel is actually doing when the hardware is connected - both the DMX dongle/node and DMX fixtures & devices.
DMX Effects are sequences of values and/or states which are made up of a series of steps. This is commonly used to create lighting animations.