This structure represents a bit field containing 32 bits.

Table 111 – RioBitFieldDataType Structure

Name	Type	Description
RioBitFieldDataType	structure	Subtype of 0:Structure defined in OPC 10000-3.
BitData	0:UInt32	32-bit unsigned representing 32 bits.
BitUsed	0:UInt32	32-bit unsigned indicating the usage of each of the 32 bits of the BitData field.

The RioBitFieldDataType is used for read-only variables only. Its representation in the AddressSpace is defined in Table 112.

Table 112 – RioBitFieldDataType Definition

Attribute		Value
BrowseName		RioBitFieldDataType
IsAbstract		False
References	NodeClass		BrowseName	DataType	TypeDefinition	Other
Subtype of 0:Structure defined in OPC 10000-3.
Conformance Units
PNRIO Channel Objects

The bit numbers of the BitData field are according to the significance of the bit within the 0:UInt32 data type. The bit numbering method applied is LSB 0, which means that bit numbering starts at zero for the least significant bit. If bit number 0 is set only, this corresponds to the numeric value 1, if bit number 1 is set, this corresponds to the numeric value 2, bit number 2 corresponds to the numeric value 4 and so on. The position of the bit in the memory allocated by the 0:UInt32 field depends on the byte order of the underlying platform.

Bits set to 1 in the BitUsed field indicate the validity of the corresponding bits in the BitData field. For bits set to 0 in this field, the corresponding bit in the BitData field shall be considered as unused by a Client. The same convention for bit numbers as described for the BitData field applies.