Interdependence Of The Functions - ABB i-bus KNX Product Manual

®
ABB i-bus KNX
4.10 Interdependence of
the functions
© 2008 ABB STOTZ-KONTAKT GmbH
Planning and application
The functions have the dependence to one another:
With the exception of the behaviour at bust voltage failure and recovery,
the highest priority if forced operation, which is triggered with the 2 bit or 1
bit object Forced operation. The output is blocked with forced operation.
At the same time the value of the object Forced operation of the output is
switched on (object value 3 or 11) or off (object value 2 or 10) with a
parameterised brightness value. The additional functions slave mode,
staircase light and light control continue to run in the background during
forced operation. The brightness is not influenced by this measure.
During active forced operation the blocking of the outputs can be triggered
or removed. At the end of forced operation the blocking is checked and
implemented if necessary.
The second highest priority is the function Blocking. With this function
the output is blocked via the 1 bit object Blocking (value 1), i.e. no switch,
dim or value commands are carried out. The brightness value is frozen at
its present level after completion of a dimming, scene or preset transition.
The staircase lighting function and the slave mode are interrupted. If the
output receives a telegram with the value 0 via the object Blocking, the
channel is re-enabled and the brightness value active before blocking is set
again. The staircase lighting continues in the background until dimming.
The dimming is implemented again after the end of blocking. Slave mode
is again implemented.
The Permanent ON (with parameterised Staircase light function) function
has a lower priority than forced operation and blocking. After ending of
forced operation or blocking the Permanent ON function is no longer active.
Permanent ON interrupts the staircase lighting function, the timer runs in the
background until the start of dimming. You can parameterise if the staircase
lighting function is restarted after the end of Permanent ON or if it remains in
a standby state.
The additional functions Slave mode in lighting control, Staircase light and
Light control have equal priority and can not be activated simultaneously.
An output can either be operated with light control, staircase lighting or slave
function.
The parameterized behaviour with bus voltage failure or recovery acts
directly on the switching contacts and thus has the highest priority.
A graphic representation with the active principles of the priorities is
described in chapter Function chart in a flow chart.
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