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Signal Interface


The interface tab:

Addressing, gate settings and selection of the control type.


Interface ID

If more than one command station is used, then the command station that is responsible for controlling the signal-decoder is specified in this field. The "Interface identifier" field can remain empty if the object is connected to the first command station (first 'digint' in rocrail.ini) from the list of command stations.


See: Addressing


Alternative to the Bus number supported by:

  • BiDiB (String: Username)
  • RocNet

Address, Port and Gate


This is control system dependent. Used only for SRCP, Dinamo and OpenDCC, otherwise it should be left blank.


Dimming speed for LED type signals.


The brightness in case of type LED.
Supported by:

  • LEDii
  • WIO (WIP)


Special settings for some Command Stations:



Simple port control using the address and port fields and the gates (red or green). See Signal Setup, chapter 3.1 for details and examples.


Signal decoders are most likely controlled with patterns on two or three ports. The patterns are set up on the Details tab.
See Signal Setup, chapter 3.2 for details and examples.
Note: Patterns can only be used with PADA/MADA addressing, and max. 5 aspects. (2.1.601+) FADA is not supported.

Aspect numbers

Use the aspect numbers specified on the detail tab for the accessory command.
The following Command Stations are supported:


Uses only the first address as offset to control all aspects. (Only for FADA/PADA)
For signals with 4 or less aspects the aspect numbers must be set.
See Signal Setup, chapter 3.3 for details and examples.


Used to control all aspects with 2, 3 or 4 outputs.
For signals with 4 or less aspects the aspect numbers must be set.

Address > 0 or Port > 0 Number of bits Aspect values
Red 1 0,1
Red + Green 2 0,1,2,3
Red + Green + Yellow 3 0,1,2,3,4,5,6
Red + Green + Yellow + White 4 0,1,2,3,4,5,6,8,9,10,11,12,13,14,15

For none flat, FADA, addressing the correct gate setting, red/green, is necessary.


Uses mobile decoder function outputs for LED signals.
The red address field value is used to address the mobile decoder. The port is the function number: 0…32.
Up to 4 aspects are supported.
The white aspect can be used to control the red/green/yellow bulbs, with the bit pattern set in the white address field, if the white address is set greater then zero, and the signals is set to 4 aspects.

Bit Bulb
0x01 red
0x02 green
0x04 yellow


Command Station Remark
BiDiB Use the accessory instead of the port command.
Xpressnet Switch off the signal outputs after 10ms.


Port type selection.
Some decoders, like BiDiB LightControl, provide different port types on the same local address.


The switch option is only usable for 2 aspect signals to provide some kind of support for libraries which do not support single gate addressing like p50 and slx.
Switch commands are send instead of output commands when this option is set.
For usage see Signal Setup, chapter 3.1.
A better way to control signals with systems unable to process outputs is the Pair gates options which also send switch commands.

Note: Use the switch option, if only one address is used to switch the signal and the signal is activated using the command station. If the signal does not move in Rocview then activate this option: Process Signal Events

Switch time

Some Command Stations allow to define a switch activation time. Check your manual for details. The time here is in ms.


This option is only usable for 2 aspect signals to swap the red/green command.
For usage see Signal Setup, chapter 3.1.

Pair gates

The Pair gates option can be of use for decoders that must controlled like this:

Aspect Port Gate
red LED on RED green
red LED off RED red
yellow LED on YELLOW green
yellow LED off YELLOW red
green LED on GREEN green
green LED off GREEN red

This option will send switch- instead of output commands.

Command time

Optional wait time in ms between commands as work around for some command stations and decoders not capable to process 2 or more commands within a very short period of time.


2 Aspects example with the OpenDecoder


  • (image with friendly permission from

In this case you only have to set port 1 for a signal with only red and green. The gate 1 variable is ignored: RED is 0 and GREEN is 1.

3 Aspects example with the OpenDecoder


  • (image with friendly permission from

Here you setup Vr0 on port 1, Vr1 on port 2 and Vr2 on port 3.

Aspect Port Gate
Vr0 RED: 1 red
Vr1 YELLOW: 1 green
Vr2 GREEN: 2 red
signal-int-en.txt · Last modified: 2023/09/12 08:11 by rjversluis