Setting Up CV21 for a Consist
CV21 allows you to set which F Functions you want the consist address to
control. For example, you will likely want all of your MTH consist engines to
respond to Start-Up/Shut Down (F3). Also, you'll likely want at your Front
engine to respond to the Bell and Horn commands (F1 and F2, respectively) and
the Front Coupler (F7 on most MTH models). Likewise, you'll want your Rear
engine to respond to the Rear Coupler command (F8 on most MTH models).
Please refer to the table below to see which bits have what decimal value and
which F Function they correspond to.
To do this:
1. Call up the Front engine on your DCC system
2. To set the Front engine to respond to the Bell (F1), Horn (F2), Start-Up/Shut
Down (F3) and Front Coupler (F7) you will want to write a value of 71 to
CV21. This is setting bits 0, 1, 2, and 6 ON.
a. CV21's bits are shown in the table below – the decimal value is shown
in parenthesis:
NOTE - CV21 is ONLY used when you have some value other than 0
written to CV19. If CV19 = 0 then the values of CV21, CV22, CV23, and
CV24 are not used
1. Call up your Middle engine (address 2 in the example)
2. Since you want to have the Middle engine respond to F3 only then write
a value of 4 (CV21, bit 2 = ON)
3. Call up your Rear engine (address 3 in the example)
4. Since you want to have the Rear engine respond to the Start-Up/Shut
Down (F3) and Rear Coupler (F8) functions you want to write a value
of 132 to CV21
Your engines are now set up according to the example above.
You will note that there is no F0 in CV21. This is because that function (FL) is
controlled by CV22. Please refer to the Advanced Consisting section for more
information regarding CV22.
M.T.H. HO S 3/6 Steam Engine
39
F
Function
F8
F6
F5
F4
F3
F2
F1
F7
Bit
(Decimal
Value)
7 (128)
5 (32)
4 (16)
3 (8)
2 (4)
1 (2)
0 (1)
6 (64)
