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
42
42
When a new absolute comfort setpoint is read in, a new basic comfort value is assigned to the
controller. There is a significant difference in the Smart room temperature controller between the
settings "dependent on comfort setpoint (basic)" and "independent setpoints".
Setting "depending on comfort setpoint (basic)".
This new basic comfort value (object “1”) also automatically causes an adjustment of the
dependent setpoints in the other operating modes, as these are relative to the basic comfort
value. All settings for setpoint shifting do not apply here, as a completely new base value is
assigned to the controller.
The specification of a setpoint via the communication object "0 - Setpoint setting" offers a
special feature. Here the new value is written to the basic comfort setpoint, a valid setpoint shift
is deleted and the controller automatically jumps to comfort, regardless of which mode the
controller was in before. This procedure is required for visualizations that make changes via
absolute setpoints. This ensures that the new setpoint sent is also reported back.
Setting "Independent setpoints".
Here, an individual absolute value can be specified for each operating mode. If, for example, the
setpoint is changed in Comfort mode (object "1"), the other setpoints remain unaffected.
A special feature is the common object "0 - setpoint setting". This always changes the setpoint in
the currently valid mode. If, for example, the controller is currently in Standby mode and the
value "20°C" is sent via object "0", the Standby setpoint is changed to "20°C" at this moment.
The following table shows the communication objects relevant for the setpoint change:
Number Name/Function
Length
Usage
0
Setpoint setting
2 Byte
Specification of a new absolute setpoint
1
(Basic) Comfort setpoint
2 Byte
Specification of a new absolute setpoint
1
Combination object (Heating)
8 Byte
Setting for 4 HVAC modes via common
combination object
1
Comfort
2 Byte
Specification of a new absolute setpoint
2
Standby
2 Byte
Specification of a new absolute setpoint
3
Night
2 Byte
Specification of a new absolute setpoint
4
Frost protection
2 Byte
Specification of a new absolute setpoint
4
Heat protection
2 Byte
Specification of a new absolute setpoint
5
Combination object (Cooling)
8 Byte
Setting for 4 HVAC modes via common
combination object
6
Current setpoint
–
Send setpoint
2 Byte
Outputs the currently valid setpoint
7
Manual setpoint value offset
–
Increase/decrease (2Byte)
2 Byte
Shift of the setpoint relative to the preset
comfort setpoint.
Object is permanently displayed
8
Manual setpoint value offset
–
Increase/decrease (1=+ / 0=-)
1 Bit
Increase/decrease the setpoint relative to
the preset comfort setpoints by the set step
width
8
Manual setpoint value offset
–
Increase/decrease (1Byte)
1 Byte
Increase/decrease the setpoint relative to
the preset comfort setpoints by the set step
width
9
Status setpoint value offset
–
Send
status
2 Byte
Sending the current status of the setpoint
shift
Table 39: Communication objects
–
Setpoint changes