17
The function of the priority control after bus voltage recov-
ery can be defined by means of a further parameter. The
output can be “actuated with priority”, “not actuated with
priority” or no active priority can be selected.
Priority control
Communication objects
The following communication objects can be selected:
Per channel:
Function
Object name
Type
Prio
Flags
Behaviour
Channel X
Switch object
1 bit
Low
CW
Receive
Channel X
Priority control
object
2 bit
Low
CW
Receive
Parameters
Per channel: Switch on the priority control function.
Channel X: General
Parameter
Setting
Priority function
none
Logic operation
Priority control
Set the priority control function.
Channel X: Priority control
Parameter
Setting
Reaction after priority
no change
follows switch object
actuated
not actuated
Function of priority after bus volt-
age recovery
no active priority
actuated with priority
not actuated with priority
t
11
10
t=0
KNX
telegram,
priority
control
t
0
t
1
1
KNX
telegram,
switching
1
0
0
Status
actuated
not actuated
With
priority On
With
priority Off
01
00 Prioriry control
deactivated
Reaction after
priority control:
follows switch object
Parameters
Per channel: Switch on the logic operation.
Channel X: General
Parameter
Setting
Priority function
none
Logic operation
Priority control
Switch on the OR logic operation and set the logic
behaviour after a RESET.
Channel X: Logic operation
Parameter
Setting
Type of logic operation
OR
AND
Value of logic object after bus
voltage recovery
1
0
- Priority control
There is a 2 bit priority object in addition to the 1 bit switch
object. The switch actuator channel is switched to high
priority switching states (relay opened / relay closed) with
the 2 bit telegram. If the 2 bit priority object receives a tele-
gram whose first bit (bit 1) has the value ON “1”, the priority
control function is active. In this case, the switch actuator
switches to the state that was defined by the second bit (bit
0) of the telegram.
Bit 1
Bit 0
Function
1
1
Switched on with priority
(output actuated)
1
0
Switched off with priority (output
not actuated)
0
1
Priority control function not
active (output behaves accord-
ing to parameter “Reaction after
priority”)
0
0
Priority control function not
active (output behaves accord-
ing to parameter “Reaction after
priority”)
Bit 0=1 leads to the closing of the relay in the “make
contact” relay mode and to the opening of the relay in the
“break contact” relay mode.
Bit 0=0 leads to the output being switched off in the “make
contact” relay mode and to the output being switched on
in the “break contact” relay mode.
If the switch object receives switching telegrams during a
priority control function, the last telegram is stored each
time and is evaluated, if necessary, when the priority func-
tion is removed (according to the parameter settings).
Using the parameter “Reaction after priority”, you can set
how the respective channel should behave when the prior-
ity function is removed (first bit (bit 1) is set to zero “0”). The
actuator can be switched on or off (actuated/not actuated),
can follow the current state of the switch object or retain
the current state (no change).
When the staircase lighting function is active, there are
fewer options available for selection.
Priority control is carried out without a delay.
