ABB i-bus KNX Product Manual page 138

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ABB i-bus KNX
© 2008 ABB STOTZ-KONTAKT GmbH
Planning and application
If the additional function Staircase light function was deactivated before bus
voltage failure (bit 0 in the status byte has the value 0), the staircase light is
activated again. Depending on the parameterised object value Switch at bus
voltage recovery the staircase light function will time our or the basis
brightness value is set. The Light Controller controls or is in standby mode.
If the Block function was active, the blocking of the device is cancelled at
bus voltage recovery. The additional function of the output is continued.
Reaction of download or ETS reset
The brightness value remains unchanged during and directly after the
download or ETS reset. The additional functions (staircase light, light control
and slave mode) as well as forced operation and blocking of the output
remain unchanged.
If another or an additional function was parameterised before download,
the following applies for the new additional function:
The Staircase light function is active and the object Activate staircase
function is written with the value 1.
If the base brightness was set for the staircase light before download,
it will be set again.
If the staircase light was not active before download it will remain
deactivated after the download.
If the staircase light was dimming before download, it will be set to base
brightness after download.
The function Light control and Slave mode are active and the objects
activate control or Activate slave mode are written with the value 1. Bit 0
in the status byte has the value 1. The light control commences with the
parameterised switch on brightness.
The special behaviour is summarized in the following table.
Note
After a reset or discharge of the Light Controller via the ETS, the stored
values, e.g. lighting characteristic curves, are still available to the Light
Controller. The calibration must be performed again.
The values are overwritten only after a new calibration. The artificial
lighting and the daylight calibrations should be considered separately
in this case.
This is independent of if the calibration has been performed manually or
automatically.
The artificial lighting and daylight calibration must be performed again with
a change of the Light Sensor arrangement.
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