Advanced Consisting - M.T.H. HO 4-8-8-4 Big Boy Engineer's Manual

Custom Speed Tables
Below is a table that shows the value to write to CV25 to achieve the desired speed
curve. For example, if you would like to use speed curve 18 then:
1. Write a value of 1 to CV52 to enable PWM Mode
2. Write a value of 1 to bit 4 of CV29
3. Write a value of 18 to CV25. Your engine will now use the speed curve #18
below
4. If you want to create your own speed table using CV's 67-94 then write a value
of 0 or 1 to CV25

Advanced Consisting

Advanced Consisting follows the NMRA standards. Any values assigned to CV's 21-
24 are ignored once the consist is removed (CV19 set to 0).
• Setting the MSB (Bit 7) of CV19 tells the engine that it is facing reverse in the
consist
• Setting CV21 and CV22 determine which F Functions the consist responds to
See diagram below for example
F
Engine 1 - Front
R F
Engine 2 - Middle
Normal Forward Direction of Travel
M.T.H. HO 4-8-8-4 Big Boy Steam Engine
R R
29
F
Engine 3 - Rear