Art. No. SC 1000 KNX
ETS. These temperature values cannot be changed later during controller operation.
When presetting the setpoint temperatures for comfort, standby and night mode, attention has
to be paid to the fact that all setpoints depend on each other as all values are derived from the
basic temperature (basic setpoint) (see page 190). The "Basic temperature after reset"
parameter in the "Setpoint" parameter page determines the basic setpoint, which is loaded
when the device is programmed via the ETS. Taking into account the "Reduce / increase the
setpoint temperature in standby mode" or "Reduce / increase the setpoint temperature in night
mode" parameters the temperature setpoints for the standby and night mode are derived from
this value depending on the heating or cooling operating mode. The deadband will be
additionally considered for the "Heating and cooling"operating mode.
In two-level control mode, all set-temperatures of the additional level are derived from the
setpoint temperatures of the basic level. The setpoint temperatures of the additional level are
determined by subtracting the "Difference between basic and additional levels", which is
permanently configured in the ETS, from the setpoints of the basic level in heating mode or by
adding the setpoints in cooling mode. If the temperature setpoints of the basic level are
changed by setting a new basic setpoint, the setpoint temperatures of the additional level will be
indirectly and automatically changed as well. Both stages will heat or cool with the same
actuating variable at the same time when the setpoint difference is "0".
The temperature setpoints programmed in the room temperature controller by the ETS during
commissioning can be changed via communication objects. In the ETS the parameter
"Overwrite setpoints in device during ETS programming operation?" can be used on the
parameter page "Room temperature control -> Controller general -> Setpoints" to define
whether the setpoints present in the device, which may have been changed subsequently, are
overwritten during an ETS programming operation and thus replaced again by the values
parameterised in the ETS. If this parameter is on "Yes", then the temperature setpoints are
deleted in the device during a programming operation and replaced by the values of the ETS. If
this parameter is configured to "No", then setpoints present in the device remain unchanged.
The setpoint temperatures entered in the ETS then have no significance.
i
During initial commissioning of the device the parameter "Overwrite setpoints in device
during ETS programming operation?" must be set to "Yes" in order to perform valid
initialisation of the memory slots in the device. The setting "Yes" is also necessary if
essential controller properties (operating mode, setpoint presetting, etc.) are being changed
in the ETS using new parameter configurations!
Limitation of the setpoint temperatures in cooling mode
In accordance with German statutory requirements, the temperature at the workplace should be
a maximum of 26 °C, or at least 6 K below outdoor temperatures of 32 °C. Exceeding these
limits is only permissible in exception circumstances. To meet these requirements, the room
temperature controller offers a setpoint temperature limit, which is only effective in cooling
mode. If necessary, the controller limits the setpoint temperature to specific values and prevents
an adjustment beyond the limits.
Page 197 of 347
Software "Smart Control 501511"
Functional description
