Datatyper (DPT)
What is DPT?
DPT stands for Data Point Types and describe how commands and values in
KNX are sent from one product to others.
Different DPT has different length and formatting of data and there are different DPT adapted to different types of values. For example, there is a DPT for sending on / off commands and another to send temperature values.
Common data
types (DPT)
The table shows the most commonly used DPT. Each DPT is identified by
an ID grouped according to its type. In the table is its intended use,
length of data and any entity listed.
| DPT id | Name | Description |
| 1.001 | DPT_Switch | Used primarily to control the lighting On/Off. Data is 1 bit, 1/0. Can represent most of the 1-bit functions. (Former EIS1) |
| 4.001 | DPT_Char_ASCII | Used to send a single character ASCII (Former EIS 13) |
| 5.001 | DPT_Scaling | Used for light values and representes values by 0-100%. Data is 1 byte between 0 - 255. (Former EIS 6) |
| 5.010 | DPT_Value_1_Ucount | Used for counter values of one byte (0-255, unsigned). (Former EIS 14 unsigned) |
| 6.010 | DPT_Value_1_Count | Used for counter values of 1 byte (-128 - 127, signedt). (Former EIS 14 Signed) |
| 7.001 | DPT_Value_2_Ucount | Used to count Values into two bytes (0 - 65535, unsigned). (Former EIS 10 unsigned) |
| 8.001 | DPT_Value_2_Count | Used for counter values in 2 bytes (-32 768 - 32767, signed). (Former EIS 10 Signed) |
| 9.001 | DPT_Value_Temp | Used for measuring of temperature. Built as 2 bytes floating point -273 - 670 760 ° C. (Former EIS 5) |
| 9.004 | DPT_Value_Lux | Used to measure lightlevel. Built as 2 bytes floating point 0-670760 lux. (Former EIS 5) |
| 9.005 | DPT_Value_Wsp | Used for measuring the windspeed. Built as 2 bytes floating point 0-670760 m/s. (Former EIS 5) |
| 9.020 | DPT_Value_Volt | Used for measuring electrical current. Built as 2 bytes floating point -670 760 - 670 760 mV. (Former EIS 5) |
| 9.021 | DPT_Value_Curr | Used to measure electrical voltage. Built as 2 bytes floating point -670 760 - 670 760 mA. (Former EIS 5) |
| 9.024 | DPT_Power | Used for measuring electrical power. Built as 2 bytes floating point -670 760 - 670 760 kW. (Former EIS 5) |
| 12.001 | DPT_Value_4_Ucount | Used for counter values of four bytes (0-4294967295, unsigned). (Former EIS 11 unsigned) |
| 13.001 | DPT_Value_4_Count | Used for counter values of 4 bytes (-2,147,483,648 - 2,147,483,647, signed). (Former EIS 11 Signed) |
| 14.007 | DPT_Value_AngleDeg | Used to measure angle. Built as 4-byte floating point with the unit degrees(°). (Former EIS 9) |
| 14.010 | DPT_Value_Area | Used for measure of area. Built as 4-byte floating point with the unit square meters. (Former EIS 9) |
| 14.019 | DPT_Value_Electric_ Current |
Used for measuring elektric current. Structured as four byte floating point with the unit A. (former EIS 9) |
| 14.027 | DPT_Value_Electric_ Potential |
Used for measureing voltage (potential). Built as 4-byte floating point with the unit V (formerly EIS 9) |
| 14.031 | DPT_Value_Energy | Used to measure energy. Built as 4-byte floating point unit with J. (the former EIS 9) |
| 14.033 | DPT_Value_Frequency | Used to measure frequency. Built as 4-byte floating point with the unit Hz. (Former EIS 9) |
| 14.038 | DPT_Value_Impedance | Used to measure impedance. Built as 4-byte floating point with the unit Ω. (Former EIS 9) |
| 14.039 | DPT_Value_Length | Used for measuring length. Built as 4-byte floating point with the unit m (former EIS 9) |
| 14.051 | DPT_Value_Mass | Used to measure mass. Built as 4-byte floating point with the unit kg. (Former EIS 9) |
| 14.056 | DPT_Value_Power | Used for measuring power. Built as 4-byte floating point with the unit W. (formerly EIS 9) |
| 14.060 | DPT_Value_Resistance | Used for measure resistance. Built as 4-byte floating point with the unit Ω. (Former EIS 9) |
| 14.065 | DPT_Value_Speed | Used for measure of speed. Built as 4-byte floating point with the unit m / s. (Former EIS 9) |
| 14.068 | DPT_Value_Common _Temperature |
Used for measure temperature. Built as 4-byte floating point with the unit °C (Former EIS 9) |
| 14.069 | DPT_Value_Absolute _Temperature |
Used for measuring the absolute temperature. Built as 4-byte floating point with the unit K. (former EIS 9) |
| 14.076 | DPT_Value_Volume | Used for measure volume. Structured as 4-byte floating point with the unit m3. (Former EIS 9) |
| 16.000 | DPT_String_ASCII | Used for transmission of text strings of 1-14 characters as ASCII. |
A complete list of all DPT can be downloaded from KNX, www.knx.org.
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