Within the BMS NETx Server we can split up complex KNX data point types to into different sub fields. For example, to activate the sub fields for a 1 byte DALI object, open the Telegram Definition, select the corresponding group address(es) and change the data type to: 238.600 DALI_Diagnostics.
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First, the DPT has to be defined in the nxaKNXDataTypeDefinitions.xml file (see XML format description in the section below):
Custom DPT
| Code Block | ||||
|---|---|---|---|---|
| ||||
<data_type name="Custom.001" descr="CustomeDPT" length_type="1BYTE" set_flag="T"> <sub_type id="Scene" desc="Scene Number" start_index="0" length="6" length_type="1BYTE" input_type="EIS14" su="U" output_type="UINT8" unit="" pre_offset="0" post_offset="0" scale="1" min_max="" /> <sub_type id="SA" desc="Scene Activation" start_index="6" length="1" length_type="1BIT" input_type="EIS1" su="" output_type="BOOL" unit="" pre_offset="0" post_offset="0" scale="1" min_max="" /> <sub_type id="S" desc="BStorage function" start_index="7" length="1" length_type="1BIT" input_type="EIS1" su="" output_type="BOOL" unit="" pre_offset="0" post_offset="0" scale="1" min_max="" /> </data_type> |
Now that the custom DPT is defined it has be announced in the BMS Studio's configuration file for telegram definitions, which can be found in <install-dir>\System\Definitions\nxaTelegramDefinitions.35.tvd.
In the Data Type line, the new Definition of the DPT should be inserted following the format <Data_Type Length_Type>|<Data<Data_Type Name>@<Data_Type Descr>. In our example the definition will be like the following:
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After saving the custom DPT in nxaKNXDataTypeDefinitions.xml and the modified nxaTelegramDefinitions.35.tvd the BMS Studio needs to be restarted to be aware of the new DPT. After that the new DPT is ready to use in the telegram definition table:
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XML format description
data_type attributes | Description |
|---|---|
name | The name of the custom DPT which will be used later. |
descr | Data type description. |
length_type | Type length of DPT, 1BIT, 2BIT, 4BIT, 1BYTE, 2BYTE, etc. |
set_flag | Set the DPT flag. |
sub_type attributes | Description |
|---|---|
id | The ID of the Sub_Type. |
desc | Sub_Type description. |
start_index | The start index of the Sub_Type. |
| |
length | The length of the Sub_Type in bits. |
length_type | The length type of the Sub_Type. |
input_type | The input type EIS1, EIS2, EIS5, etc.... |
su | S (signed) or U (unsigned); default is signed |
output_type | The Sub_Type output type. |
unit | The Sub_Type unit type °C, K/h, m/s, %, etc... |
pre_offset | offset to be added before scaling |
post_offset | offset to be added after scaling |
scale | Sub_Type scaling factor |
min_max | define the min and max value e.g. "0:10" min is 0 and max is 10. |
Article applies to the following products:
NETx BMS Platform
NETx Multi Protocol Server
NETx BMS Server 2.0