KB27: DT402 - Controlling Functions

This article was last updated on Oct. 23, 2013, 10:27 a.m. | Print Article | Leave Feedback

The DT402 Throttle will control up to 29 functions in walkaround and radio modes.

When operating in IR Mode the DT402 series throttles will control up to 9 functions (F0-F8).

The numeric keypad is always active in the normal Fn operation mode.

The functions that are currently on for the active loco will be displayed on the top line of the DT402 display.

The following figure shows an example of how the display looks when functions 0 and 1 are turned on for loco 1652 on the R Throttle.

Controlling Functions F0-F12

1.
Determine which throttle you want to control functions on and make it the active throttle by single clicking the Throttle knob or by turning the throttle knob a couple of clicks.

2.
If the Mode indicator in the center of the bottom line of the display (between the loco addresses) does not show Fn, press the FUNC key once to enter the function mode for the active throttle.

3.
The DT402’s numeric keypad is always active in function mode during normal loco operations. When the mode indicator on your DT402 shows Fn, simply press any number on the keypad to activate or deactivate any function from 1 to 12. The functions that are on for the active loco will be displayed on the top line of the display. Function 0 (F0) Press the LAMP / 0 key to toggle F0 between on and off. Each time the LAMP / 0 key is pressed while in function mode, F0 will change from off to on or vice-versa. The top line of the display will display a 0 when the F0 is on and will be blank when F0 is off. F0 is most often used for reversing head lights but can be set up for other functions as well. Function 2 (F2) Press the HORN / 2 key on the numeric keypad. F2 is labeled with a whistle icon to remind you that this is the preferred function for whistle or horn operation. F2 is a special non-latching function. This means that F2 can be used to control a whistle or horn sound from the decoder. It will only sound when F2 is being held down. This lets you vary the length of time that the whistle blows, just like the prototype.

Functions 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, & 12


Press the button on the numeric keypad that corresponds with the function number you want turn on/off.

The top line of the display will display the numbers of the functions that are on for the active loco address.

F1 is labeled with a bell icon to remind you that this is the preferred function for bell operation and F3 is labeled with a coupler icon to remind you that its preferred function is coupler operation.

Note:
DT402 may process functions slightly differently depending on command station capabilities.

Controlling expanded Functions F13-F19


The DT402 series throttles feature an expanded feature set and can address additional functions F13-F28.

To address the upper function ranges, the throttle design incorporates a ‘+10’ and ‘+20’ key action.

These keys, along with the standard numeric keypad, permit the full function range to be addressed. Here’s how it’s done:

1.
While holding the FUNC key down, press the 1 key then release both keys simultaneously. The throttle will go into the ‘+10’ mode and display will show the following:

2. Select the second digit from the throttle’s numeric keypad and you’re done. Example: To turn on function 18, just hold the FUNC key down while pressing the 1 key then releasing both keys simultaneously. Next press the 8 key, just press the 8 key again to toggle off. The figure ‘8’ on the top line of the display will toggle on and off as will the locomotive’s function.

3.
Press the FUNC key once to exit the ‘+10’ function mode and return to the normal single digit function mode. Note that you will have to return to the ‘+10’ mode to check on whether any functions in that range are currently active.

Controlling Functions 20-28


1.
While holding the FUNC key down, press the 2 Key then release both keys simultaneously. The throttle will go into the ‘+20’ mode and display will show the following:

2. Select the second digit from the throttle’s numeric keypad and you’re done. Example: So if you want to turn on function 27, just hold the FUNC key down while pressing the 2 key then releasing both keys simultaneously. Next press the 7 key. That’s it. You’ve just turned function 27 on.

3.
Press the FUNC key once to exit the ‘+20’ function mode and return to the single digit function mode. Note that you will have to return to the ‘+20’ mode to check on whether any functions in that range are currently active.

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