NPCI Control Octet

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Section 6.2.2 Page 48 of the Specification

NPCI Control Octet (found in the NPCI, the first part of a NPDU)
Bit Description If 1 If 0
7 ( & 0x80 )  ? NSDU conveys Network Layer Message NSDU contains BACnet APDU
6 Reserved Reserved Reserved
5 ( & 0x20 ) Destination Specifier DNET DLEN DADR present DNET DLEN DADR absent
4 Reserved Reserved Reserved
3 ( & 0x08 ) Source Specifier SNET SLEN SADR present SNET SLEN SADR absent
2 Expecting reply  ?  ?
1,0 Priority 11=Life Safety, 10=Critical Equip, 01=Urgent 00=Normal


Keyword List
APDU BBMD BVLC BVLL DADR DNET Encoding I-Am LSAP MAC NPCI NPDU NSAP NSDU SA SADR SNET

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