Block Code switch KNX

The code switch KNX turns an ordinary KNX push button into a code keypad, for instance at the entrance or at the garage: each rocker stands for a digit. For every button a function of its own with a code of its own can be stored, for example open the door or arm the alarm system. The control element shows whether the code switch is enabled, offers the same code entry on the screen and is used to change the codes.

Operation

1. Key: a tap on the tile opens the code entry.
2. Switch: enables the code switch (Active) or locks it (Inactive); a locked code switch accepts no code. If no enable is set up, only Active is shown here and the code switch is always enabled.

At the KNX push button a short press enters a digit, a long press selects the function of this button; its LED then lights up. A correct code makes the LED flash for a few seconds, a wrong one all LEDs. If the code is not completed within 10 seconds, it counts as wrong.

The code entry

1. Symbols of the title bar: clock, presence and settings, see below.
2. Entry: a * stands for each digit entered, a - for each missing one. C clears the entry.
3. Key: changes the code of the selected function. The title bar turns yellow and asks one after the other for Password old – the previous code or the master code –, Password new and Password new repeat. Another tap on the key cancels.
4. Digit buttons: as many as at the push button. A tap enters the digit, holding for 1.5 seconds selects the function of this button. The green dot shows the selected function. With the last digit the controller checks the code by the same rules as an entry at the push button: if it is correct, it switches and the dialog closes, otherwise Code wrong appears. If the code switch is locked, Code switch not enabled appears. An hourglass is shown during the check; if there is no answer within 5 seconds, No response from controller appears and nothing has been switched.

As long as the settings have not yet been loaded from the controller, an hourglass is shown instead of the digit buttons.

Switching times and presence

Behind the clock there are switching times that enable or lock the code switch – for example enabled during the day and locked at night. Everything else about switching times is described under Presence.

Behind the house you set whether the code switch is enabled (Active) or locked (Inactive) when the presence changes. A tap on a symbol selects whether switching takes place for this state at all. Switching times and presence only act when an enable is set up.

Settings: one-time code

A one-time code is an additional code generated at random, for instance for craftsmen or guests. It applies to every function.

1. One-time code time: a newly generated one-time code is valid this long – any number of times during this period. At 0 it is valid until it is used once, at the push button or in the control element.
2. One-time code time factor: the unit of the time; every tap switches between seconds, minutes, hours and days.
3. Generate one-time code: shows the valid one-time code, 0 means none. A tap generates a new one.

Time and time factor act at once, Ok closes the dialog.

Setup

This section is meant for the installer of the system.

The control element is linked to the function block Block KNX Code switch: first create the function block and its addresses, then right click on the control element and select the function block. In the same menu Take comment takes over the name of the function block as text. See also Presence.

• Number of buttons, code length and what is sent per function on a correct code are set at the function block. A pulse lasts 1 second.
• At first no function has a code. It is assigned with the key and the master code – this is the parameter Reset PIN of the function block. It is accepted with its own number of digits, even if the code length is larger (for instance 6, 8 or 10 digits).
• Switch, switching times and presence need the address Enable at the function block. The one-time code settings only act when the inputs One-time code trigger, One-time code time and One-time code time factor are linked to addresses there. If the one-time code comes from outside via One-time code external, none is generated.

Parameters

Address links

All addresses sit at the function block and are taken over when linking.

See also General properties of all control elements.