How to establish common mandatory parameters and its exception



IM/ABs can define different parameter settings for passenger and freight trains. They can decide what technical information they need and which fields the applicant needs to complete in order for the train to run on their network when creating the path request at each operating point. This document describes how to set common mandatory parameters and how to make some common parameters mandatory depending on IM parameters. 



Configuring common mandatory parameter exceptions is available for Admin (PCS Support) and IM users.



It is usually possible between the first and third Friday in November to prepare the common mandatory parameters for the next timetable period. After the deadline, IM/ABs only have read privileges on the common mandatory parameter view.


You have read-only access to all IM agency Common parameters except your agency IM parameters.

You have edit access only for your own agency IM parameters.


The Common mandatory Parameter submenu is located in the Administration-Reference data submenu in Common Mandatory Parameters.


Default parameters

In PCS there are some parameters are defined as mandatory by default:

  • Activity types
  • Loco type number
  • Traction mode
  • Train weight
  • Train length
  • Weight of carriages
  • Length of carriages


No one can change these parameters, the added faded blue colour indicates the blocked state by the system, it is necessary to fill in the minimum at each operation point.



First, you need to select the timetable period in which the created common mandatory parameter will be valid. If your company has a passenger and cargo profile, you can also choose which train type the common mandatory parameter applies to.

When the Common Mandatory Parameter window opened you can select which parameter should be mandatory according to your business needs on top of the default parameters. 

Tick the checkbox () next to the selected parameter to become mandatory and  your changes.


In the below example the "Location type" is NOT defined by the IM/AB as a common mandatory parameter, therefore, it is not mandatory to fill in for the applicants when filling the timetable information.


If the IM/AB decides that the "Location type" should be mandatory then it becomes mandatory to be filled in by the applicants when building the timetable.



Configure exception


Common parameters should be selected as mandatory

The dependency can only be set if the IM parameter is determined as a single-choice type. 

Example: if your IM parameters are NOT of single-choice type, they will not appear and will not be selected as dependencies! 



IMs should be able to select some Common Parameters as mandatory in dependence on IM parameters:

  • Is mandatory when: mandatory only with the specific condition depending on the IM parameters
  • Is mandatory except when: mandatory by default except for the condition depending on the IM parameters



These are the steps that you need to do to add an exception:

  • Select a common mandatory parameter by moving your mouse to the parameter name


  • Click on the exclamation mark to open the exception wizard
  • Select the exception


  • Add IM parameter that triggers the exception with its parameter value


The Common Mandatory Parameters wizard shows that IM -parameter has been added to the Common mandatory parameter as a dependency:


Use case

Infrabel’s use case for the profiles: if the applicants select the IM-specific parameter “Traffic type of freight train” with the parameter value “2 combined traffic”, the common train parameter “Container profile” becomes mandatory.

In the above example if the “Traffic type of freight train” IM parameter is selected with the parameter value “1 blocked train”, the common train parameter “Container profile” is NOT mandatory.

But if the parameter value is selected which is defined as dependencies then the profile values become mandatory



Press "Edit" to edit the already added exception condition



Press "Remove" to delete the added exception.

After the confirmation message appears to confirm your next activity


  • Remove: the exception will be removed from the common mandatory parameter
  • Cancel: if you press cancel, the exception still will be valid and will NOT be removed
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