Standard 135-2008, BACnet™—A Data Communication Protocol for Building Automation and Control Networks
NOTE: All documents linked from this page are in 
PDF-format.
Standard 135-2008 Addendum g (135-2008g-1. Update BACnet Network Security)
Standard 135-2008 Addendum h (135-2008h-1. Change Device_Busy to Busy and apply to the Command Object type, p. 2; 135-2008h-2. Prevent overflow and underflow in Pulse_Converter object's Count property, p. 3; 135-2008h-3. Add context tags to Clause 21 production BACnetPropertyStates, p. 4; 135-2008h-4. Add new BACnetEngineering Units, p. 5; 135-2008h-5. Define COV notification service Error returns, p. 6; 135-2008h-6. Remove non-support for automatic cancellation of COV subscriptions, p. 8; 135-2008h-7. [This section removed from this addendum; 135-2008h-8. Add even and odd day support in Dates, p. 10.)
Standard 135-2008 Addendum j - June 20, 2009 (Add a new Access Point object type; Add a new Access Zone object type; Add a new Access User object type; Add a new Access Rights object type; Add a new Access Credential object type; Add a new Credential Data Input object type; Add a new ACCESS_EVENT event algorithm; Add a new ANNEX P BACnet encoding rules for authentication factor values.)
Standard 135-2008 Addendum k (135-2008k-1. Add support for UTF-8, p. 2; 135-2008k-2. Change JIS Reference, p. 7.)
Standard 135-2008 Addendum l - June 20, 2009 (Add new workstation BIBBs and profiles)
Standard 135-2008 Addendum n (135-2008n-1. Add support for long Backup and Restore preparation times, p. 2.)
Standard 135-2008 Addendum o - June 20, 2009 (Accommodate remote operator access and NAT in Annex J BACnet/IP)
Standard 135-2008 Addendum q - January 24, 2009 (135-2008q-1. Allow unicast I-Ams, p. 1.; 135-2008q-2. Define virtual addressing for data links with MAC addresses longer than 6 octets, p. 2.; 135-2008q-3. Define the use of ZigBee as a BACnet data link layer, p. 3.)
Standard 135-2008 Addendum p (135-2008p-1. Add a new Global Group object type)
Standard 135-2008 Addendum r - June 20, 2009 (Clarify transitions in FLOATING_LIMIT and OUT_OF_RANGE events; Clarify router action when a network is marked as temporarily unreachable; Clarify the destination MAC used when replying to a broadcast DER frame; Clarify the handling of write priorities greater than 16; Clarify LogDatum presentation.)
Standard 135-2008 Addendum s - June 20, 2009 (Clarify the circumstances that cause the File object's Archive property to be set to TRUE or FALSE; Require support for COV subscriptions of at least 8 hours' lifetime.)
Standard 135-2008 Addendum t (135-2008t-1. Add XML data formats, p. 1.)
Standard 135-2008 Addendum u (135-2008u-1. Clarify the use of RejectPDUs, p. 2.; 135-2008u-2. Add error code UNSUPPORTED_OBJECT_TYPE for CreateObject service, p. 4.; 135-2008u-3 Add new Abort and Error codes, p. 5.; 135-2008u-4 Specify proper Errors when attempting access to the Log_Buffer property, p. 13.)
Standard 135-2008 Addendum v - June 20, 2009 (Fix the MS/TP TokenCount Value; Clarify 'Supported'; Remove NM-CE-A from Device Profiles)
Standard 135-2008 Addendum w (135-2008w-1. Add more primitive value objects, p. 2.)
Standard 135-2008 Addendum x (135-2008x-1 Fix the Criteria for COV for Load Control, p. 2.; 135-2008x-2 Clarify Trend Log Time Stamp, p. 3.; 135-2008x-3 Clarify ReadRange on Lists, p. 4.; 135-2008x-4 Clarify Results of Using Special Property Identifiers, p. 5.)
Standard 135-2008 Addendum y (135-2008y-1. Specify Deployment Options for MS/TP, p. 2.)
Standard 135-2008 Addendum z (135-2008z-1 Add Event_Message_Texts. 135-2008z-2 Add UnconfirmedEventNotification to Automated Trend Retrieval BIBBs. 135-2008z-3 Modify MS/TP State Machine to Ignore Data Not For Us. 135-2008z-4 Add New Engineering Units. 135-2008z-5 Add Duplicate Segment Detection.)
Standard 135-2008 Addendum ab (135-2008ab-1 Add More Standard Baud Rates for MS/TP, p. 2)
Standard 135-2008 Addendum ac (135-2008ac-1 Clarify the Usage of Dates and Times, p. 2)
Standard 135-2008 Addendum ag (135-2008ag-1 Prevent BBMD Broadcast Storms, p. 2; 135-2008ag-2 Align BIBBs for Automated Trend Retrieval, p. 3.)
Standard 135-2008 Addendum ah (135-2008ah-1 Remove ReadPropertyConditional, p. 2. )