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Trailers, the same as drivers, can be assigned to units either manually or automatically.

Simultaneous assignments of trailers to units are the same as for drivers.

To assign or separate trailers to units, you should have the Create, edit, and delete trailers access right to the resource.


Manual assignment

Manual assignment and separation can be done in the Trailers panel. To the right of each trailer, there is the icon or which assigns or separates the trailer. If you do not have enough access rights, the icon is disabled.

Click on the Assign to unit icon (), select the required unit, and click OK.

The contents of the list correspond to the work list of the Monitoring panel. If there are no units in the list, click on the Add all available icon (). If the list is still empty, it means you have no access rights to the units.

To separate a trailer from a unit, click on the unit icon to the right of its name, and then use the icon. Besides, you can separate the trailer by registering a new working shift or by deleting from history.

Automatic assignment

Automatic method of assigning trailers to units requires special equipment, such as, for instance, iButton digital electronic keys.

Also, make sure to make the required adjustments in the system: both for trailers and for units. Follow the steps described below.

1. Create a special sensor of the Trailer assignment type in the properties of each unit to which the trailer is supposed to be assigned automatically. You can use the avl_driver parameter for this sensor or any other parameter depending on your equipment and its configuration.


2. Click on the icon of automatic assignment () to create a list of units to which the trailers from this resource can be assigned automatically. A box with the list of all available resources opens. Verify that you have access rights to the user that is the creator of the resource, otherwise, a warning will be displayed.

Select the resource whose trailers will be used in the automatic assignment. To learn which trailers belong to a particular resource, go to the Trailers panel and apply the filter by resource (drop-down list to the right of the New button).

After choosing a resource, click Next. If only one resource is available, it will be selected automatically.

The next dialog box contains a list of units to which the trailers can be assigned automatically. Select the required units.

The trailer will be automatically assigned to a unit with the help of iButton if two conditions are met: this unit has a special sensor configured in its properties and it is indicated in the list of units assigned automatically.

A trailer is separated automatically when the unit sends a message with the separation code or with the parameter of the Trailer assignment sensor without any value. Besides, you can create a notification with the Separate trailer action.

When a trailer with the activated Exclusive option is assigned to the unit, other trailers are separated from this unit automatically.

To disable the automatic assignment of trailers, click on the icon, select a resource, and clear the selection of the required units.

Registration of the working interval

This option allows to view the history of assignments, remove them if necessary, and register the shift of the trailer manually. To perform these actions, click on the Register work interval icon () to the right of the trailer name.

To view the history of assignments, specify the required interval and click Show. In the list of assignments, you can see the unit name, the date and time of each assignment and separation.

You can remove an incorrect assignment or separation from the list by clicking on the icon  at the end of the line.

You cannot remove the last assignment or separation registered in the system.


To register a shift manually, click on the Register shift button in the lower left corner of the dialog box. Next, select the unit and specify the beginning and/or end of the shift. To activate the field of the shift end, enable the Shift end option.


When registering a shift manually, the date and time indicated as its beginning and end should be in the past or present. If you specify the beginning and end in the future, the shift is registered with the current date and time.

To finish the shift registration, click OK.


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