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Bob is exactly right.

I have only a TMCC command station and I have some Legacy ( TMCC 2 ) . Equipment. They work fine for the features that the basic TMCC command set sends out but I cannot control some of the more advanced features.

We do not need different connections or types, just more command strings of the lithe type.

This is getting way over complicated.

Legacy equipment just recognizes more commands because the command string CAN start with a different sequence which makes the decoder realize that it is an EXTENDED command and execute it.

TMCC has some commands that are always the same per a given function key, like horn and bell and front and rea coupler. The others and even those could be anything else from open the door on a milk car to start the rotary blade on the rotary snow plow.

I have a legacy crane that is perfectly controllable with the TMCC throttle. It used the speed up command to rotate CW and the speed down command to rotate CCW. That is just trueing the knob CW or CCW on the original TMCC throttle . That know was never intended to be a direction control for a crane cab rotation but since a crane does not have a propulsion motor the decoder in it uses that for something else.

I have created several “templates” for the function keys in TMCC to use with different locomotives. The accessory or car or engine that comes with TMCC also lists the functions that that specific piece of rolling stock responds to an AUX 1 + 4 command is just for that device.

We can easily build the command string for all of the basic functions key possibilities in Legacy, leave the ones from the original TMCC alone since the decoder will sort that out. Then you just label the function keys like we do for every other type of rolling stock or accessory and we are done.

Jim


LeFevre Engineering
James L. LeFevre P.E.
2801 S 24 th St.
Rogers, AR. 72758
jlefevre1@...