The data key frame DataSetMessage data and related headers are shown in Figure 32.
Figure 32 – Data Key Frame DataSetMessage data
The encoding of the data key frame DataSetMessage structure is specified in Table 143.
If the key frame is a heartbeat DataSetMessage, only the header is encoded but the following structure shall not be encoded into the DataSetMessage.
Table 143 – Data Key Frame DataSetMessage structure
|
Name |
Type |
Description |
|
FieldCount |
UInt16 |
Number of fields of the DataSet contained in the DataSetMessage. The FieldCount shall be omitted if RawData field encoding is set in the EncodingFlags defined in 7.2.2.5.4. |
|
DataSetFields |
BaseDataType [FieldCount] |
The field values of the DataSet. The field encoding depends on the DataSetFlags1.Field Encoding of the DataSetMessage Header defined in 7.2.2.5.4. The default encoding is Variant if bit 1 and 2 are not set. |
|
Padding |
Byte [*] |
Optional padding added if the encoded DataSetMessage is smaller than the ConfiguredSize. The DataSetMessage is padded with bytes with value zero. |