Technical Manual
Glass Push-button II Smart & Push-button Smart 86 [Series .02]
MDT technologies GmbH •
51766 Engelskirchen • Papiermühle 1 • Germany
Phone: +49-2263-
880 • [email protected] • www.mdt.de
94
94
The setting "
Send measured value on change
" can be used to set the change on which the sensor
sends its current temperature value. If set to "do not send", 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.
In addition, a correction value can be parameterised for the internal sensor under the setting
"
Calibration value for internal sensor
". This correction value serves to increase/decrease the actual
measured value. The adjustment range is from
“
-50 to 50 x 0,1 K
”
, i.e. the measured value can be
lowered by “
-
5” Kelvin and raised to a maximum of “+
5
”
Kelvin. For example, if a value of
“
2
0”
is set,
the measured temperature value is raised by 2 Kelvin. This setting makes sense if the sensor is
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.
Note
:
After initial installation/programming the measured values are stable after approx. 30 minutes.
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 135.
Example
:
Weighting: 50% internal / 50% external, internal sensor 25°C, external temperature 15°C
=> transmitted temperature 20°C.
Two messages can be output via "
Temperature for upper message value
" and "
Temperature for
lower message value
" when activated. Both signalling functions each have a separate
communication object.
Principle
:
If the maximum value is exceeded, a "1" is sent. If the value falls below it, a "0" is sent.
If the value falls below the minimum value, a "1" is sent. If it is exceeded, a "0" is sent.
The following table shows the available communication objects:
Number
Name/Object Function
Length Usage
135
Temperature
–
Send measured value
2 Byte Sends the current temperature
136
Temperature
–
External sensor - Input
2 Byte Receives the temperature of the external
sensor
137
Temperature
–
Maximum value exceeded
1 Bit
Sends a message if the upper message value
is exceeded
138
Temperature
–
Minimum value fallen below
1 Bit
Sends a message when the value falls below
the lower message value
Table 78: Communication objects
–
Temperature measurement
