ABB i-bus KNX Product Manual page 166

®
ABB i-bus KNX
Commissioning
Object value "Switch" on
bus voltage recovery
Options:
This parameter determines the reaction of the communication object Switch after a bus voltage recovery.
As standard the communication object Switch receives the value 0.

Don't write: After bus voltage recovery, the value 0 is retained in the communication object Switch.
The switch state is not re-determined.
Note
Before the very first download (device fresh from the factory), the value before bus voltage failure is
undefined. For this reason, the communication object Switch is written with 0 and the contact is open.

Write with 0: The communication object Switch is written with a 0 on bus voltage recovery. The
contact position is redefined and set based on the set device parameterization.

Write with 1: The communication object Switch is written with a 1 on bus voltage recovery. The
contact position is redefined and set based on the set device parameterization.
Note
Take note of the reaction on bus voltage failure, recovery and download.
The device draws the energy for switching the contact from the bus. After bus voltage is applied, it takes
about ten seconds before sufficient energy is available to switch all contacts simultaneously.
Depending on the transmission and switching delay on bus voltage recovery set in the General
parameter window, the individual outputs will only assume the desired contact position after this time.
If a shorter time is set, the device will only switch the first contact when sufficient energy is stored in the
device, in order to ensure that enough energy is available to immediately bring all outputs safely to the
required position if there is another bus voltage failure.
Enable function Time
Options:

No: The parameter window remains disabled and invisible.

Yes: The - Time parameter window appears.
After the Time function has been enabled, the parameter window - Time is enabled. Further settings are
undertaken there.
Note
For a more precise description of the function, see
164 2CDC508134D0202 | FCA/S 1.x.x.1
Do not write
Write with "0"
Write with "1"
No
Yes
Communication objects Output H, p. 229 ff.