LocDialog Funtion Tab.


Free text to describe the decoder function which is also used as tooltip for the Loco control dialogs. Pushing the tripple dot […] button at the right side of each function will open the event dialog. Events are optional, do not use it if you only want tooltips.
Use the < Fg and Fg > buttons to select the function group.

Group Range
1 1 - 4
2 5 - 8
3 9 - 12
4 13 - 16
5 17 - 20
6 21 - 24
7 25 - 28
8 29 - 32


A short description of the functionality; Keep it brief to fit in Mobile Client buttons.
This is mandatory for saving a function definition; Without a description all other settings are lost.


With the timer box the function can be deactivated automatically. Values greater than zero are activation seconds. If left to zero the function will be on until it is set off by an event or manual action.

Note: Activation time resolution is changed from seconds to 100ms in revision 4562.
The range has been increased to 1000 in revision 4574, so the maximal activation time is 1000x100ms=100s.


Function event picker dialog.

Function events will only work when running your locomotive in auto mode!

On/Off event

Select one or more blocks to trigger this function on or off.


The events enter, in, exit known from Sensors and Blocks can be used to trigger a function on or off.

In addition, run and stall can be used to trigger a function on or off depending on the loco running (speed step >0) or not (speed step =0).


A sound file name to play on activating the function.
The file names must be defined complete (name.extension).
The sound path and player must be setup in Rocrail General Tab.


A icon file name to show in the function button.
File format: PNG with transparent background.
The file names must be defined complete (name.extension).
File location: Image path
A double click on this field open a file choose dialog of this folder.

Address & Fx

Function mapping on a secondary decoder address.

  • Only activated if the address is set greater then zero.
  • The same protocol is used as set on the Interface Tab.
  • Set/leave the address to zero to disable mapping.

Binary States

If Fx > 100 it will be interpreted as set “Binary State” -100 on following command stations:

The address field must be set > 0 and maybe the same as the primary decoder address.
See for details: NMRA S-9.2.1 Feature Expansion Instruction

Known applications:

  • TCCS (TrainCoupling&CommunicationSystem) AKA “T4T”

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