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LocoDialog Interface Tab.

Interface ID

Only set this to the IID you set in the rocrail.ini if your setup has more than one CS connected.


If this option is activated all Loco and Function commands will send to all connected Command stations.


See: Addressing


The decoder address which range depends on the decoder type and underlying Command Station.

  • Marklin mfx-Decoders may need special settings depending on the command station. See the wiki page of the relevant command station, if applicable.
  • Locos with address 0 (zero) are considered to be analog locos without decoders which are only supported by TrackDriver systems. "Stretched 0 Bit" according to NEM 670 is not supported.

The optional second address can be used for T4T (TrainCoupling&CommunicationSystem).


Some Command Station, like the ESU Ecos, are using an Object ID instead of an address for referring to a specific loco.
This field can be left empty because the Ecos library can also look up locos by ID or address.


Some command stations do support multiple protocols; Check the user manual for details.
If the address is set to zero the protocol should be set to Analog for Track Driver support.

Protocol version

If the Command Station cannot determine the decoder type itself you must specify the version as listed here ddx-en or found in the SRCP description. Most systems do not use this parameter because it is set directly in the CS or it does only support one version.

Decoder steps

Number of speed steps the decoder is set up to. Rocrail needs the number of the decoder's speed steps e. g. to be able to calculate the wanted velocity in percent or KM/H.

  • The number of speed steps of the decoder, the command station and in Rocrail must match otherwise the loco light (F0) may not work correctly.

The optional second speed steps can be used for T4T.

Number of functions

Number of extra functions supported by the decoder used. Default F0…F4.



Only to be used when this is an analog loco in combination of the Dinamo CS. (Check the documentation.)
A value of 5 is a good start to experiment with.

Dir Change pause

Some old Delta like decoders need some pause between a direction change and the last turnout command. With about 100ms this will do the trick when running DDX.

Poll info

XpressNet does not propagate loco changes issued by throttles.
By activating this option, and if the loco is not in auto mode, every second a request is send to the Command Station to get the actual information needed to update the Rocrail clients.
:!: Use with care. This option is not recommended and not supported in the Forum, and uses unnecessary CPU resources. :!:


When the loco runs the wrong direction this flag can be swapped.
For commuters this flag is automatically swapped in terminal station block types and for routes in the opposite direction.
This flag is default set and means a Loco run direction like coming out of the box; some older decoders do only remember the direction for a short period after shut-down the power.
When the decoder has "forgotten" its previous direction, then it will run the next time in its "default" direction.
If the flag is not set the placing type is swapped.

Read also: Direction in Rocrail


A flag for correcting the BiDi, RailCom, direction in case the decoders is not correctly polarised.
See also: BiDi Direction


Adjust acceleration

  • Only available in combination with DCC and Trains.
  • The max. load and the acceleration range must be set greater then zero.
  • If the total train weight is zero the min. acceleration value is used.
  • The new calculated acceleration value will be written by POM in CV3 after assigning a train or in case Car properties have been modified.
  • The min. acceleration value will be written by POM in CV3 after releasing the assigned train.

Max. Load

The max. load for this locomotive in tons.

Min./Max. Acceleration

The CV3 range to use for loads between zero and max. load.

Server trace example

20130723.090557.995 r9999I cmdrD000 OLoc     2707 processing cmd="assigntrain" for [E03]
20130723.090557.995 r9999I cmdrD000 OLoc     2848 consist [train1] assigned to loco [E03]
20130723.090557.995 r9999I cmdrD000 OCar     0354 car [test] loaded weight [500]
20130723.090557.995 r9999I cmdrD000 OLoc     2026 loco [E03] adjust acceleration: CV3=16
20130723.090557.995 r9999I cmdrD000 OVirtual 0437 program cmd=1 mode=0
20130723.090557.995 r9999I cmdrD000 OVirtual 0465 POM: set CV3 of loc 1003 to 16...
20130723.090557.995 r9999I cmdrD000 OLoc     2079 loco [E03] train length=56 weight=500 

loc-int-en.txt · Last modified: 2019/04/30 15:06 by rjversluis