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
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The setting "
Send measured value on change of…
" can be used to set the change on which the
sensor sends its current temperature value. If set to "not active", the sensor does not send a value,
regardless of the size of the change.
The setting "
Send measured value cyclically
" can be used to set the intervals at which the sensor
sends its current temperature value. The cyclical transmission function can be activated or
deactivated independently of the setting "Send measured value on change". Measured values are
also sent if the sensor has not detected a change. If both parameters are deactivated, a value is
never sent.
An external sensor can be activated or deactivated via the weighting "
Sensor internal/external
". If
the weighting is set to 100% internal, no external sensor is activated, and no communication
objects appear for the external sensor. With any other weighting, an external sensor is activated,
and the associated communication objects are also displayed. The "External temperature sensor"
object receives the temperature currently measured by the sensor. The "mixed" temperature is
shown in the display, and this measured temperature value is transmitted via object 58.
Example
:
Weighting: 50% internal / 50% external, internal sensor 25°C, external temperature 15°C
=> sent temperature value 20°C.
Important:
The external sensor is monitored with a time of 30 minutes. If no new value is
received within this time, only the internal sensor is used!
A correction value can be set via the parameter "
Calibration value for internal sensor
". This is
used to increase/decrease the actual measured value. The setting range is from -5 to 5 K, i.e. the
measured value can be lowered by up to -5 Kelvin and raised by up to a maximum of 5 Kelvin. For
example, if a value of 2 is set, the measured temperature value is raised by 2 Kelvin. This setting
makes sense if the sensor was installed in an unfavourable location, such as above a radiator or in a
draught area. The temperature sensor sends the corrected temperature value when this function is
activated.
Important
:
After initial installation or programming, the measured values are stable after about 30
minutes.
Two signalling objects can be activated with the parameters "
Upper/Lower message value
". One is
the function for the upper message value, the other for the lower response value. The two message
functions each have a separate communication object.
Principle
:
If the maximum value is exceeded, a "1" is transmitted. If the value falls below it, a "0" is
transmitted.
If the value falls below the minimum value, a "1" is transmitted. If it is exceeded, a "0" is
transmitted.
The corresponding communication objects are shown in the table:
Number Name/Function
Length
Usage
58
Temperature
–
Send measured value
2 Byte
Sends the current temperature.
59
Temperature
–
External sensor input
2 Byte
Receives the temperature of the external
sensor.
60
Temperature
–
Maximum value exceeded
1 Bit
Sends a message if the upper message
value is exceeded.
61
Temperature
–
Minimum value fallen below
1 Bit
Sends a message when the value falls
below the lower message value.
Table 18: Communication object
–
Temperature measurement
