ABB i-bus KNX FCL/S 1.6.1.1, Product Manual

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ABB i-bus
®
KNX
Start-up
36 2CDC508116D0203 | FCL/S x.6.1.1
Enable limitations
Options: No
Yes

Yes : Four communication objects, Limitation x , (x = 1...4), are enabled for limitation of the fan speed.
This function defines fan speed ranges (limitations) which may not be over/undershot.
Important
The parameterized start-up behavior which is a technical characteristic of the fan has a higher priority
than a limitation, i.e. if a limitation is activated in fan speed 2 and start-up behavior is set at speed 3
then the following behavior will result: The fan is in the OFF state and receives a control signal for fan
speed 1. First it goes to speed 3 (start-up speed), then 2, which is specified via the limitation. Due to the
limitation, the actual required fan speed 1 will not be reached.
The sequence of the displayed parameters corresponds with their priorities, i.e. the parameter with the
highest priority has limitation 1 followed by limitations 2, 3 and 4.
In manual mode limitations are inactive.
The set limitations are reactivated when automatic mode is reactivated.
The following points apply for limitations:

The limitation need not necessarily apply to one fan speed only. It can also encompass another range
of the fan speeds, i.e. only certain fan speeds can be set if the limitation is active. In this way, a limited
control is also possible.

The limitation is activated when a telegram with the value 1 is received on the limitation communica-
tion object, and is lifted when the same object receives a telegram with the value 0. A manual action
ends automatic control.

If a limitation is activated, the device switches to the parameterized fan speed regardless of the control
value. If another fan speed or a speed outside the "limitation range" is set when the limitation is acti-
vated, then the required speed or the limit speed of the range is set.

When limitations are switched off, fan speed is recalculated and executed. This means that during lim-
itation the device operates normally in the background, the outputs are not changed and implementa-
tion only occurs once limitation ends.
Each of the four limitations used to limit the fan speeds has the same parameters.
Important
They are prioritized according to the listed sequence. The highest priority is assigned to limitation 1 and
the lowest to limitation 4.