Art. No. SC 1000 KNX
- If, due to the "Fan level on change-over to manual" parameter, "Fan level OFF" is
requested, the controller will switch the fan off during the change-over to manual operation.
On subsequent pressing of the button for manual control, the "Start-up via level" parameter
is taken into account and the switch-on level set. Then, the controller waits in this level until
further manual operation.
- If, due to the "Fan level on change-over to manual" parameter, no defined level is
requested ("No change" setting) and the fan was switched off during automatic operation,
then it will remain switched off on changing over to manual operation. On subsequent
pressing of the button for manual control, the fan is switched to the first level. The "Start-up
via level" parameter is thus not taken into account.
i A configured switch-on level is applied directly without a waiting time.
i With a fan change-over via the 1-bit objects, when the fan level is changed by the
controller, the active fan level is first switched off before the new level is switched on. In this
case, the switch-off of a fan level and the subsequent changeover to a new fan level is not
evaluated as a fan start-up, also meaning that the switch-on level is not set In automatic
operation, the switch-on level is only taken into account if the fan was switched off
previously by the command value evaluation (command value < level 1 threshold value
minus hysteresis) and then it is to start up using a new command value.
i The start-up via the switch-on level also takes place after a change-over from manual
operation to automatic operation, providing that the fan was most recently switched off in
manual operation and, in automatic operation, a new command value requires the fan to be
switched on.
i The parameter "Start-up via level" is not checked for plausibility in the ETS, meaning that
an implausible parameterisation is possible. For this reason, care should be taken to
ensure that there is no switch-on level in the configuration which is higher than the actual
fan levels. The fan controller automatically corrects a faulty parameterisation by activating
level 1 for the start-up, meaning that the fan starts up normally without a switch-on level.
Fan level limit
To reduce the fan noise of a fan coil, the fan level limit can be activated. The level limit reduces
the sound emissions by limiting the maximum fan level to a fan level value specified in the ETS
by the "Level limit" parameter (limit level). The limitation can be switched on and off via a
1-bit "Fan, level limit" object, and thus activated in accordance with requirements, for example
via a timer during night-time hours in order to reduce noise in bedrooms, or via "manual"
operation of a pushbutton when a "quiet room" is needed (auditorium or the like). The limitation
of the fan level is activated by receipt of a "1" telegram via the object "Fan, level limitation".
Deactivation is therefore achieved through the receipt of a "0" telegram.
While a limitation is active, the fan controller prevents the fan from being switched to a higher
level than the limitation level. If, at the instant that the limit is activated, the fan is running at a
level that is greater than the limit level, then the fan level is immediately reduced to the limitation
value. In this case the switching sequence of the individual levels and the waiting time
configured in the ETS are also taken into account in the level change-over.
The limitation level can be one of the available fan levels.
The level controller distinguishes between Automatic and Manual operation.
i The fan level limit overdrives the switch-on level. As a result, when the fan is switched on, if
the limit is active, the level has an active limit and the switch-on limit is not started. In this
case, the limit level is jumped to without waiting.
i The level limit has no effect with an activated fan forced position.
Page 217 of 347
Software "Smart Control 501511"
Functional description
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