IEC_BACNET_BIT_STRING (STRUCT)

TYPE IEC_BACNET_BIT_STRING : STRUCT

Structure for representing the BACnetBitString type

A Bit String is a BACnet primitive datatype. A Property Contents containing data of this type will have its tag equal to DATA_TYPE_BIT_STRING. A common Property that is represented as a Bit String is the Protocol-Services-Supported Property maintained by each Device object. The actual length of the Bit String (the number of reliable bits in the data field) is indicated by the bitCount field. A Bit String is stored in a fixed length byte array, with a capacity of 80 bits. nn

NOTE: The first Bit in BACnet is the most significant bit in the first octet of the buffer (buffer[0] = (0x80 | 0x40) // setting the first two Bits)

InOut:

Name	Type	Comment
bitCount	IEC_BACNET_UNSIGNED	Number of valid bits in buffer
data	ARRAY [0..(BACNET_MAX_BIT_STRING_BUF - 1)] OF IEC_BACNET_BYTE	Buffer for the bit string (the MSB in the first byte of this buffer is bit #0 in BACnet
mask	ARRAY [0..(BACNET_MAX_BIT_STRING_BUF - 1)] OF IEC_BACNET_BYTE	Specifies a mask to disable some bits set above (for internal use only)