2 TRC System V.4

Only one type of trigger is used in the system:  TRC 4 trigger for closure of rail crossing (kuid2:458053:100686:17).

It must be placed on the track near the crossing, the arrow directed toward it :

The system requires a single trigger for a level crossing. Placing two triggers (upstream and downstream of the level crossing) can create problems in the system.

The TRC trigger watches the track both in front and behind . As soon as it detects a train, it will command the closure of the crossing.  Once the train passed over the crossing, it commands its opening .

There are two modes of operation : basic and advanced. The basic mode is suitable for most cases where you will be using a fixed track crossing (see 'Small Glossary' at the bottom of the page).  The advanced mode is suitable for all your needs, including when you want to operate a crossing made up of assemblies of objects.

Procedure in basic mode:

The easiest way to proceed: for a crossing, simply place a TRC trigger in close proximity, arrow pointing to the crossing  and THAT'S IT!  

By default, the system will be in 'Automated Detection' mode ; it will detect an approaching train and proceed to close the barriers when necessary.

Schematically, this is how it works:

1. By default, the trigger observes the track ahead and behind it for a distance of 1600 metres.

2. As soon as a train enters the detection zone, the trigger evaluates its speed and calculates the point on the track at which the barriers should start closing.

3. The train has just passed this point: the barriers close. 

But you may need to customise the detection distances (for example, in a slow-moving manoeuvring area). In this case, proceed as follows:

On the tuning tab displayed, enter the distances of detection back and forth (according to the orientation of the trigger on the track).

On the same panel, you are reminded that if the detection radius values are left at zero, the 'Automated Detection'  feature is activated.

Click on the 'help' for more information.

The 'Stay Open' option is presented in the following page.

Procédure in Advanced Mode.

      If you want to activate several crossings simultaneously OR if you want to build your own customized crossing with scenery-type objects                     

      (see How to do ?)  :

• 1. in 'create route' or 'edit route' mode,

  2. be sure having placed on your route all the objects you want to command : level crossing, level crossing of scenery-type, invisible crossing  ( - see Matérials -) as well as all the necessary triggers

  3. name all these objects following the format XXX&YYY (see How to do ?) ,

  4. for each trigger, enter both their detection radius and their name (XXX&YYY) into the tuning tab

  5. do the same for all the crossing on the route.

If you close the tuning tab and reopen it, the list of 'attached objects' to the trigger is refreshed.

A few examples in Basic Mode :

Two tracks level crossing :

In Basic Mode, two triggers are installed near of the crossing ; they are unnamed ; their detection distances have been left at zero by default ; they observe the track ahead and behind and operate in 'Automated Detection' mode.

If the crossing has just been released while the other track is still occupied by a moving train, the crossing remains closed.

Series of level crossings :

In this example, the train causes the closure of the crossing1 as soon it enters into the detection radius of the trigger 1.

It causes also the closure of the crossing2 as it enters into the detection radius of the trigger 2.

The crossing 1 will open as the train passes it.

The crossing2 will do it as well. 

If the train turns back afterwards, the same scenario will take place symetrically.

In Advanced Mode :

The crossings and the two triggers are named  (for example  1&1, 1&2, 1&3 et 1&4)

As a train is detected, both level crossing will close even if the trigger1 doesn't 'see' the train because of the orientation of the junction.

Little glossary :

Crossing fixed track, also called MoCrossing : this is a one-piece crossing, which includes both the  track(s) and the animated barriers.  An example: <kuid:455946:5410> RD29 pn 1 lane manual vx

Crossing made up of assemblies of objects à la carte: several elements assembled to form a crossing.  An example :  one <kuid2:458053:102660:4> TRC invisible crossing 90° and its two scenery barriers  <kuid2:458053:102882:5> TRC US M scenery , plus a concrete passage to look good (non functional) <kuid:458053:100472>  Grade Crossing 90° concrete passage