Technical Manual
Glass Room Temperature Controller Smart SCN-RTRGx.02
MDT technologies GmbH •
51766 Engelskirchen • Papiermühle 1
•
Germany
Phone: +49-2263-
880 • [email protected] • www.mdt.de
48
48
The following table shows the corresponding object:
Number Name/Function
Length Usage
36
Outdoor temperature
–
Receive
measured/reference value
1 Byte Receiving an external measured value as a
reference variable
37
Reference control
–
Reference value in percent
1 Byte Receiving an external percentage value as a
reference variable
37
Reference control
–
Reference value in Lux
2 Byte Receiving an external brightness value as a
reference variable
Table 47: Communication object
–
Reference control
Example of use (guided via outdoor temperature):
For the temperature control of a room, the setpoint (22°C) should be raised so that in an outdoor
temperature range of 28°C to 38°C the temperature difference between outdoor and indoor
temperature does not exceed 6K.
Settings to be made:
Basic comfort value: 22°C
Reference control: active
Minimum reference variable: 28°C
Maximum reference variable: 38°C
Setpoint change at maximum reference variable: 10°C
If the outdoor temperature were to rise to 32°C, the setpoint would be increased by the following
value:
X = 10°C * [(32°C-28°C)/(38°C-28°C)] = 4°C.
This would result in a new setpoint of 22°C+4°C=26°C.
If the outdoor temperature reaches the set maximum value of 38°C, the setpoint would be 32°C
and would not increase any further if the temperature continues to rise.
Example of use (guided via Lux value):
A high lux value signals high solar radiation. As this contributes to heating the room, the heating
output can be reduced via the controller at the same time. Heating up too quickly in the room is
avoided and contributes to increasing energy efficiency.
Example of use (guided via percent value):
The guidance via percentage values offers a universal possibility to influence the control. For
example, with the help of a logic module, a percentage value can be output as the result of several
factors that have an influence on the control.
