Reaction On Bus Voltage Failure; Reaction At Bus Voltage Recovery, Download, Ets Reset And Application Update - ABB i-bus KNX Product Manual

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ABB i-bus KNX
Planning and application
4.2

Reaction on bus voltage failure

The reaction of each individual output at bus voltage failure can be parameterized in parameter window A:
General with the parameter Reaction on bus voltage failure. This parameterisation acts directly on the re-
lay and has the highest priority.
For further information see:
Before the first switching action is possible after bus voltage recovery, the SE/S will first store enough en-
ergy in order to ensure that enough energy is available to immediately bring all relays safely and immedi-
ately to the required (parameterized) position in the event of a renewed bus voltage failure.
With the parameterization Contact unchanged, the relay contact at bus voltage failure is not changed, i.e.
with the function Staircase lighting, this remains active until bus voltage recovery and until a new switch
action is received.
After the contact positions are set with bus voltage recovery, the Energy Actuator remains non-functional
until the bus voltage recovers.
4.3 Reaction at bus voltage recovery, download, ETS reset and application
update
The Energy Actuator draws the energy for switching the contacts from the bus. After bus voltage is ap-
plied, sufficient energy is only available after about 10 seconds to switch all contacts simultaneously, see
Technical
age as set in the parameter window General, the individual outputs will only assume the contact positions
that result from the function switching tree after this time. The SE/S will only switch a contact when suffi-
cient energy is stored in the SE/S, in order to ensure that enough energy is available to immediately bring
all outputs safely to the required switch state in the event of a renewed bus voltage failure.
Reaction at download and ETS reset
The following values of the communication objects can be changed via the bus:
•
Time, duration and limit with the intermediate meters
•
All threshold limits
•
Load limit with load control
•
Scene assignment
•
Shedding stage of the output
Should you intend these values changed via the bus to be overwritten after a download or an ETS reset
with the parameterized values, the corresponding parameters Overwrite ... with download or ETS reset
must be set to yes. With no the values changed via the bus on download and ETS reset are retained.
134 2CDC 505 084 D0203 | SE/S 3.16.1
Function chart, page 120
data, page 7. Depending on the set transmission and switching delay after recovery of bus volt-