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

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ABB i-bus KNX
Planning and application
4.4

Reaction on bus voltage failure, recovery, download and ETS reset

The way in which the device reacts on bus voltage failure or recovery, download and ETS reset are
described below.
Important
For system reasons, the device switches the outputs OFF for about 1 second after bus voltage
recovery, download or ETS reset. The reaction is the same after overload, short-circuit and supply
voltage recovery.
Switch off is not taken into account in the status objects.
After switch off, the outputs assume the current state.
4.4.1

Bus voltage recovery

Fan or switch actuator reaction to bus voltage failure can be set.
4.4.2 Bus voltage recovery

A fan speed value can be predefined for bus voltage recovery. In Switch actuator mode, the
communication object Switch can be written with 0, 1 or not written.

Status communication objects are sent provided that the option Only after changing or After a change
or request has been set.

The sending delay is only active at bus voltage recovery!
252 2CDC508134D0202 | FCA/S 1.x.x.1