More Advanced Consists
I discussed using CVs 21 & 22 in my July 2016 DCC Corner column and in other posts on advanced consisting. Here is a little bit more on using CVs 21 & 22. If I repeat myself it’s only because I consider important. Even in an advanced consist you can control the functions of individual locomotives using their primary address. However when using advanced consists you can use CVs 21 & 22 to control how individual locomotives will respond when function commands are sent to the 2-digit consist address.
So how does this work? Using CVs 21 and 22 you can control how each of the first eight functions responds to commands when in a consist. For example you can turn off lights and sounds in all the middle units and only allow the first unit to respond. And this is all controlled by the decoders in the locomotives based on how you program CVs 21 and 22.
Some decoders now offer other advanced consisting functionality. For example, the new Econami decoders allow you to control how functions F0-F28 respond, customize automation of these functions, and also provide consist momentum control. Soundtraxx Econami decoders use CVs 245 & 246 to control these extra functions and also implement CV247 for certain automatic effects associated with functions F0-28.
Although you can calculate the values to program into CVs 21 and 22 using the bit settings described in most DCC system and decoder manuals it becomes pretty complex when multiple functions are involved, especially when you add in the automatic effects. That is why I am going to beat the DecoderPro drum once again. All the settings for these various CVs are organized in one pane and you can just point and click with your mouse to program them.