MDT Technologies SCN-RTRGS.02, Техническое руководство

Страница: 65 / 110

Technical Manual
Glass Room Temperature Controller Smart SCN-RTRGx.02
MDT technologies GmbH • 51766 Engelskirchen • Papiermühle 1 • Germany
Phone: +49-2263- 880 • knx@mdt.de • www.mdt.de
65
65
4.4.4.6 Additional level
Important: The additional level is only available in “Heating” mode.
The picture shows the available settings:
Figure 30: Settings – Additional level
The following table shows the setting options for additional level:
ETS-Text
Dynamic range
[Default value]
Comment
Additional level
▪
not active
▪
active
Activation of the additional level.
Direction of action with
rising temperature
▪
normal
▪
inverted
Indicates the control behaviour
with increasing temperature.
Control value
▪
2-step control (switching)
▪
PI control switching (PWM)
Setting the type of controller that
is used.
Distance 0,5 – 5,0 K
[2,0 K]
Defining the setpoint of the
additional stage as the difference
to the current setpoint.
Table 68: Settings – Additional level
The additional level can be used in slow systems to shorten the heating phase. For example, in the
case of underfloor heating (as the basic stage) a radiator or an electric heater could be used as an
additional level to shorten the longer heating phase of the slow underfloor heating.
The
direction of action of the control variable can be set as “ normal ” or “ inverted ” : For details, see
chapter 4.4.4.4 Direction of controller ).
For setting the controller type of the control value , the user can choose between 2-step control
and PWM control. The communication object of the additional level is therefore always a 1-bit
object and only switches the control value ON or OFF.
The setpoint of the additional level can be configured with the parameter “ Distance” . The set
distance is subtracted from the setpoint of the basic level, which then results in the setpoint for the
additional level.
Example: The controller is in Comfort mode for which a basic comfort value of 21°C has been set.
The distance of the additional level has been set to 2.0K. This results in the following for the
setpoint of the additional level: 21°C - 2.0K = 19°C
The table shows the communication object for the additional level:
Number Name/Function
Length Usage
14 Control value additional Heating
– Send control value
1 Bit Controlling the actuator for the additional
level
Table 69: Communication object – Additional level