ABB i-bus KNX Product Manual page 247

ABB i-bus® KNX PLANNING AND APPLICATION
12.3 Locking of outputs
The device does not possess any mutually electromechanically interlocked output contacts. Interlocking
can be implemented via a logical connection with the group objects Status Upper end position and
Status Lower end position . The output sends the value 1 on these group objects when the blind/shutter
is in the respective end position. The blind/shutter is in an intermediate position if the value 0 is sent on
both group objects.
The group objects can be enabled in the parameter Enable group objects "Status Upper/Lower end
pos.".
Example:
An awning must not be moved when the window is open. Conversely, a drive must not open the win-
dow when the awning is down.
12.4 Telegram rate limitation
The bus load generated by the device can be limited using the telegram rate limit. This limit relates to all
telegrams sent by the device.
The device counts the number of telegrams sent within the parameterized period. As soon as the maxi-
mum number of sent telegrams is reached, no further telegrams are sent on the ABB i-bus® KNX until the
end of the period. A new period commences at the end of the previous period. The telegram counter is
reset to zero, and sending of telegrams is allowed again. The current group object value at the time of
sending is always sent.
The first period (break time) is not precisely predefined. It can be anywhere between zero seconds and
the parameterized time. The subsequent sending times correspond to the parameterized time.
Example:
Maximum number of telegrams sent = 5, period = 5 s. 20 telegrams are ready to send. The device imme-
diately sends five telegrams. The next five telegrams are sent after a maximum of 5 seconds. From this
point, a further five telegrams are sent via ABB i-bus® KNX every 5 seconds.
Product manual | SAH/S x.x.7.1 | 2CDC505173D0211 Rev. A 247