KNX datapoint in Boss’nX: display, controls and pulses

In the Boss’nX component editor, these settings determine how a KNX datapoint is displayed and controlled in the supervision: numeric value with + / − buttons or a slider, value list, texts and colors of a boolean state, pulse button for an impulse relay. They complete the datapoint’s group addresses and DPT.

Intended for administrators and installers with Manage components, for read and command datapoints. To configure an alarm, follow configuring a threshold or value alarm instead.

Before you start

• Open the KNX datapoint in the component editor. Its addresses and DPT are confirmed.
• The visible options depend on the DPT and on the Cmd, Feedback and Alarm checkboxes in the datapoint’s header.

Display a number or a value list

For a non-boolean datapoint, choose the Format d’affichage (display format, shown in French):

Choice	Settings to check
Numeric, with Cmd	Choose Display style → + / − buttons (current) or Slider. Fill in Min, Max and Pas (step) according to the commands allowed on the installation.
Numeric, with Feedback only	The datapoint displays a value: the command settings Min, Max, Pas and the command style are not offered.
Value list	Click + Add value for each option: a number in the first field, its Label in the second. With Cmd, also choose Dropdown (current) or Buttons in Display style. In read-only mode, the options translate the received values into labels.

Each list option contains a numeric value and a non-empty label. Delete an unnecessary option with the trash can on its row. Leave the last field before reviewing the list and saving.

Set the limits, unit and factor

For a numeric command, the form suggests 0, 100 and 1 as limits and step. These are starting values, not a range validated for the installation: have the limits and step suited to the hardware confirmed before keeping them.

Unit and Factor can appear for a numeric KNX datapoint. Review the unit after any DPT change. To apply a conversion or correct a measurement, have the expected setting confirmed by the installer. If its effect on the display is not established, contact support before changing Factor. Do not infer a conversion formula from the name of this field alone.

Customize the texts and colors of a boolean datapoint

With a boolean DPT, the form shows Valeur si VRAI (value if true), Label si VRAI (label if true), Valeur si FAUX (value if false), Label si FAUX (label if false) and a Couleur (color) for each state.

1. Check the 1/0 values and the texts suggested according to the DPT, then make sure they match the real meaning for the device.
2. Click the Couleur dot of the relevant state to choose its color.

After a DPT change, Replace boolean labels? can offer to replace your custom texts:

• Apply accepts the new labels;
• Cancel refuses this replacement of the texts, without returning to the previous DPT: review the datapoint;
• Don’t ask again skips the following confirmations in this browser session.

The texts and colors set how the datapoint is presented. The device’s current state is read from its status feedback.

Configure a pulse (impulse relay)

This option appears for a boolean datapoint with Cmd.

1. Check Pulse (impulse relay).
2. By default, each press sends 1. Check Send 0 (instead of 1) only if the intended actuator triggers on 0.
3. Fill in Button label (optional) if needed.
4. To display the received state, check Feedback and fill in the feedback address. Without status feedback, the button remains a plain trigger and does not show the current state.
5. For the user to confirm before sending, check Confirm command in the datapoint’s header.
6. Save the component, then reopen the datapoint to review the pulse mode, the value sent, the label and the confirmation.

A pulse sends the same value on each press; the displayed state only changes when the status feedback is received. This setting defines no duration, no alternation 1 then 0 and no guaranteed state toggle. To use the configured command, see buttons and pulses.

Assign a tag and prepare the installation

The Tag list associates a tag with the datapoint; a tag can also be suggested from the label. Check the selected choice before saving. Tags can be used in the rules or permissions applied to datapoints: managing them is described in assigning tags.

Pending installation marks a datapoint prepared before its physical installation. In the viewing screens, it can appear as a grayed-out row with a dash in place of its control, and no alarm is created for this datapoint while it remains pending. It is not a command lock: commands remain active, so do not use this marking to isolate equipment. To interpret a pending row, see the component display.

Check the result

1. Leave the last field, review the values, then click Create or Save.
2. Reopen the form to check the saved settings.
3. View the component display, then test the command with setting a numeric value or the datapoint’s buttons.
4. Check physical operation on the installation, according to its procedure.

Troubleshooting

Message or symptom	Action
Add at least one option, Invalid option value or Option label required	Complete the list rows, with a number and a label, or remove those that are not needed.
Setting missing from the form	First check the DPT and the checked functions. Do not change protocol at random.
Save or display still uncertain	Note the component, the datapoint, the expected setting and the tests already done.

If the problem persists, contact support@can-nx.com with this information.

French labels: checkboxes Cmd, Re.Etat and Alarme; Numérique, Liste de valeurs, Style d’affichage, Boutons + / − (actuel), Slider, Menu déroulant (actuel), Boutons, + Ajouter une valeur, Unité, Facteur, Impulsion (télérupteur), Envoyer 0 (au lieu de 1), Label du bouton (optionnel), Confirmation envoi commande, En attente d’installation, Enregistrer; dialog Remplacer les libellés booléens ? with Appliquer, Annuler and Ne plus demander; messages Ajouter au moins une option, Valeur d’option invalide and Label d’option requis. In the English interface, Format d’affichage, Pas, Valeur si VRAI/FAUX, Label si VRAI/FAUX and Couleur stay displayed in French in this form.