47
ABB i-bus
®
KNX
Project design and programming
4.3.6 Parameter window:
Status
The behaviour of the status and fault communication objects is defined
in the
Status
parameter window. The detection of a fault can take up to
30 seconds depending on the number of electronic ballasts.
Fig. 26:
Status
parameter window – Status settings and fault signals
Send telegram “Status On/Off”:
In the setting “no”, the function and
the communication objects are not available. In the parameter setting “only
on read request”, the object value “Channel X - Telegr. Status On / Off” can
only be read out after a read request. In the parameter setting “on change of
status”, the current switching state is sent on a change.
Send telegram “Status Brightness Value”:
In the setting “no”, the function
and the communication objects are not available. In the parameter setting
“only on read request”, the object value “Channel X - Telegr. Status Bright-
ness Value” can only be read out after a read request. In the parameter
setting “on change of status”, the current value status is sent on a change.
The first status value is reported back immediately after a change and not
when the final value is reached. This applies to dimming processes as well
as brightness transitions via the object “set brightness value”. As a result,
long brightness transitions can be visualized particularly well.
Transmission delay time: Telegram “Status Brightness Value”:
With this
parameter, the sending of the brightness value telegram is delayed by the
set period after a change, in order to avoid an unnecessary bus load.
In applications in which brightness control or lighting control is implemented
or several channels are operated, it is advisable to set a longer transmission
delay time so that the control speed is not influenced by an increased bus
load. The period is dependent on the control speed. Once the final dimming
value has been reached, there is a delay for the set period until the bright-
ness value is sent.
