Page updated on 7 March 2026

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Behavioural model

The model describes behavioural aspects of the command and control system.


Main route interactions

Main route setting interactionsZST+ZZT pressed

The collaboration diagrams, below shows the communication between components to achieve a main route settings.

The first diagram covers main route setting between an entrance signal and an exit signal. The messages and purpose of them between the components are:

  1. reqMainRoute:
    Obtain CabNo
  2. getMainRoute:
    Check if route is clear.
    Deliver CabNo to traction selectors.
    Set target point route at turnouts.
  3. setMainRoute:
    Set route status at main signals.
    Obtain aspect target main signal.
    Enable traction at traction selectors.
    Lock turnouts.
    Obtain lowest maximum speed of points.
    Set aspect at start distance and main signal.

The diagrams below shows the communication between components to achieve this main route setting.

Figure with SpDrL60-col3,1,1 Main route setting, entrance to exit signal.

Message 1: reqMainRoute

Component Prerequisite Action
Component Prerequisite Action
R3 ZST pressed (Start). Not blocked. Not locked.  
VR3 Not blocked. Not locked. Send message 1.
Massage reference: 1.1

Message 2: getMainRoute

Component Prerequisite Action
Component Prerequisite Action
3 Not vacant. Cab number is set. Add Cab number to message 2. Send message 2.
Massage reference: 2.1
VR3 Not locked.
R3 Not blocked. Not locked. Pass message 2 through.
Massage reference: 2.2
103 Vacant. Not locked Enable traction from Cab number in massage 2. Pass message 2 through.
Massage reference: 2.3
W2 Vacant. Not locked. Not blocked. Add maximum speed to message 2 for both directions. Send message 2 in both directions.
Massage reference: 2.4 and 2.5.1
W1 Vacant. Not locked. Not blocked. Store direction message 2 came from. Add maximum speed to message 2. Send message 2.
Massage reference: 2.5.2
V1 Not locked. Not blocked. Pass message 2 through.
Massage reference: 2.5.3
101 Vacant. Not locked Enable traction from Cab number in massage 2. Pass message 2 through
Massage reference: 2.5.4
n.V1 Vacant. Not locked Pass message 2 through
Massage reference: 2.5.5
h
A ZZT pressed (Target). Vacant. Not blocked. Not locked. Pass message 2 through
Massage reference: 2.5.6

Message 3: setMainRoute

Component Prerequisite Action
Component Prerequisite Action
The last automatic block, here Jp21 Vacant. Not Locked Enable traction from Cab number in massage 2. Send message 3.
Massage reference: 3.1
… Label in progress …

The second diagram covers a route between a exit signal and running track. The messages between the components and purpose of them are:

  1. reqMainRoute:
    Obtain CabNo
  2. getMainRoute:
    Check if route is clear.
    Deliver CabNo to traction selectors.
    Set target point route at turnouts.
  3. getOverlap:
    Check if overlap route is clear.
  4. setMainRoute:
    Set route status at main signals.
    Enable traction at traction selectors.
    Set and lock turnouts.
    Obtain lowest maximum speed of points.
    Set aspect at start main signal.

The diagrams below shows the communication between components to achieve this main route setting.

Figure with SpDrL60-col3,1,2 Main route setting, exit to running track.

Label in progress

Shunting route settings interactionsVST+VZT pressed

The collaboration diagrams, below shows the communication between components to achieve a shunting route settings.

The first diagrams covers a shunting route between a shunting signal at an exit signal to a terminating track. The messages and purpose of them between the components are:

  1. getShuntingRoute:
    Check if no route is set.
    Set target point route at turnouts.
  2. setShuntingRoute:
    Enable shunting traction at traction selectors.
    Lock turnouts.
    Show shunting allowed aspect.
Figure with SpDrL60-col3,2,1 Shunting route setting from shunting signal at exit signal.

Message 1: getShuntingRoute

Component Prerequisite Action
Component Prerequisite Action
VR3 VST pressed (Start). Not locked. Not blokked. Send message 1.
R3 Not locked. Pass message 1 through.
Massage reference: 1.1 ⇨
103   Pass message 1 through
Massage reference: 1.2 ⇨
W2 Not Locked. Not blocked. Pass message 1 to both turnout directions
Massage reference: 1.3.2 ⇨
V1 Not Locked. Not blocked. Pass message 1 through
Massage reference: 1.3.3 ⇨
3b   Pass message 1 through

Message 2: setShuntingRoute

Component Prerequisite Action
Component Prerequisite Action
n.V1 VZT pressed (Target). Not Locked. Not blocked. Set lock
Send message 2
Massage reference: ⇦ 2.1
3b   Allow traction
Pass message 2 through
Massage reference: ⇦ 2.2
V1   Set lock
Pass message 2 through
Massage reference: ⇦ 2.3
W2   Set lock
Pass message 2 through to entry point of turnout
Massage reference: ⇦ 2.4
103   Allow traction
Pass message 2 through
Massage reference: ⇦ 2.5
R3   Set lock
Pass message 2 through
VR3   Set Lock
Set shunting allowed signal aspect
Pass message 2 through
Massage reference: ⇦ 2.6
3   Allow traction

The second diagram covers a route from a shunting signal. The messages between the components and purpose of them are:

  1. getShuntingRoute:
    Check if no route is set.
    Set target point route at turnouts.
  2. setShuntingRoute:
    Enable shunting traction at traction selectors.
    Lock turnouts.
    Show shunting allowed aspect.
Figure with SpDrL60-col3,2,2 Shunting route setting-From shunting signal.

Message 1:  Label in progress

Component Prerequisite Action
Component Prerequisite Action
… … …
Massage reference: …
… Label in progress …

Main route releasing interactionTrain detection

The collaboration diagrams, below shows the communication between components to achieve a main route releasing.

The first diagram covers main route releasing from an exit signal to a running track. The messages and purpose of them between the components are:

  1. nonVacant:
    Sets previous signal at danger.
  2. nonVacant:
    Sets previous signal at danger.
  3. nonVacant:
    Sets previous signal at danger.
Figure with sSpDrL60-col3.1.3 Main route releasing-from exit signal.

Message 1: Label in progress

Component Prerequisite Action
Component Prerequisite Action
… … …
Massage reference: …
… Label in progress …

The second diagram covers main route releasing between a entrance and exit signal. The messages between the components and purpose of them are:

  1. nonVacant:
    Sets previous signal at danger.
  2. nonVacant:
    Sets previous signal at danger.
  3. nonVacant:
    Sets previous signal at danger.
  4. relMainRoute:
    releases mainRouteSet next main or intermediate signal.
  5. relOverlapRoute:
    Releases overlapped traction selector.
    Unlocks overlapped turnout.
Figure with SpDrL60-col3_1_4 Main route releasing from entrance signal.

Message 1: Label in progress

Component Prerequisite Action
Component Prerequisite Action
… … …
Massage reference: …
… Label in progress …

Shunting route releasing interactionsTrain detection

The collaboration diagrams, below shows the communication between components to achieve a shunting route releasing.

The first diagram covers shunting route releasing from an exit signal to a running track. The messages and purpose of them between the components are:

  1. nonVacant:
    Sets previous signal at danger.
  2. nonVacant:
    Sets previous signal at danger.
Figure with SpDrL60-col3.2.3 Shunting route releasing from shunting signal at exit signal.

Message 1: Label in progress

Component Prerequisite Action
Component Prerequisite Action
… … …
Massage reference: …
… Label in progress …

The second diagram covers shunting route releasing between a entrance and exit signal. The messages between the components and purpose of them are:

  1. nonVacant:
    Sets previous signal at danger.
  2. nonVacant:
    Sets previous signal at danger.
  3. nonVacant:
    Sets previous signal at danger.
Figure with SpDrL60-col3.2.4 Shunting route releasing from shunting signal.

Message 1: Label in progress

Component Prerequisite Action
Component Prerequisite Action
… … …
Massage reference: …
… Label in progress …

Main route cancelling interactionsZZT+FRT pressed

The collaboration diagrams, below shows the communication between components to achieve main route cancelling.

The first diagram covers main route cancelling between an exit and entrance signal. The messages and purpose of them between the components are:

  1. cancelBlock:
    Disable traction of the traction selector at the adjacent block
  2. cancelMainRoute:
    Clear route set status at main signals.
    Disable traction at traction selectors.
    Unlock turnouts.
Figure with SpDrL60-col3_1_5 Interaction collaboration main route cancelling.

Message 1: Label in progress

Component Prerequisite Action
Component Prerequisite Action
… … …
Massage reference: …
… Label in progress …

The second diagram covers a route between a entrance and exit signal. The messages between the components and purpose of them are:

  1. cancelOverlap:
    Disable traction of the traction selector of the overlap after the exit signal
  2. cancelMainRoute:
    Clear route set status at main signals.
    Disable traction at traction selectors.
    Unlock turnouts.
Figure with SpDrL60-col3,1,6 Interaction collaboration main route cancelling.

Message 1: Label in progress

Component Prerequisite Action
Component Prerequisite Action
… … …
Massage reference: …
… Label in progress …

Shunting route cancelling interactionsVZT+FRT pressed

The collaboration diagrams, below shows the communication between components to achieve main route cancelling.

The first diagram covers main route cancelling between an exit and entrance signal. The messages and purpose of them between the components are: cancelBlock: Disable traction of the traction selector at the adjacent block cancelMainRoute: Clear route set status at main signals. Disable traction at traction selectors. Unlock turnouts.

Figure with SpDrL60-col3,2,5 Shunting route cancelling from shunting signal at exit signal.

Message 1: Label in progress

Component Prerequisite Action
Component Prerequisite Action
… … …
Massage reference: …
… Label in progress …

The second diagram covers a route between a entrance and exit signal. The messages between the components and purpose of them are: cancelOverlap: Disable traction of the traction selector of the overlap after the exit signal cancelMainRoute: Clear route set status at main signals. Disable traction at traction selector

Figure with SpDrL60-col3,2,6 Shunting route setting from target shunting signal.

Message 1: Label in progress

Component Prerequisite Action
Component Prerequisite Action
… … …
Massage reference: …
… Label in progress …

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