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devices:microset:av-bv-assignments

VLC DDC BV and AV assignments

Each VLC has a number of pre-assigned data points – binary and analog values (BVs and AVs) – which are used to control the Microset II and read status from it. These data points are available from the VLC as BACnet objects. BACnet-compliant devices can access the properties of these objects. For a complete reference of objects and properties available in VLCs, see the Programmer's Guide and Reference for BACtalk Systems (LTBT-TM-PRGRMR).

Note The following tables reflect only with the Present Value property of the AV and BV objects. These are listed as data points.

BV assignments

Point Read only Description On action or status Off action or status
BV64 NA Controls occupied/unoccupied or rented/vacant status (see DDC operating modes)Sets Microset II to occupied or rented operationSets Microset II to unoccupied or vacant operation
BV65 NA Sets On/Off mode (see DDC operating modes)Enables On/Off modeDisables On/Off mode
BV66 Override status. Activated in unoccupied or vacant modes when the user initiates override from the Microset IIOn when override timer (AV98) is non-zeroOff when the override timer (AV98) is zero
BV67 Occupied status. Reflect the value of BV64 or BV66. Also reflects user selection of On/Off mode when BC64 is On (see DDC operating modes)Space is occupied. Current setpoint values (AV99, AV100) are calculated using occupied logicSpace is unoccupied. Current setpoint values (AV99, AV100) are calculated using unoccupied logic
BV68 NA Field service mode and balance mode lockoutLock out both field service and balance modesAllow either field service or balance mode
BV69 NA English/metric mode swap (seeDDC operating modesSwap native units mode between English and metricUses units as determined by VLC native units
BV70 Microset connection statusMicroset detectedMicroset not detected
BV71 Native unit mode status from the native mode set in the VLC DDC headerEnglish unitsMetric units
BV721) 2) NA Fan low speedEnable fan low speed status indicator at Microset II
BV733) 4) NA Fan medium speedEnable fan medium speed status indicator at Microset II
BV745) 6) NA Fan high speedEnable fan high speed status indicator at Microset II
BV,,, NA And there are more descriptionsmore On statusesand more Off statuses

AV assignments

Point Read only Description On action or status Off action or status
AV90 NA Controls occupied/unoccupied or rented/vacant status (see DDC operating modes)Sets Microset II to occupied or rented operationSets Microset II to unoccupied or vacant operation
AV91 NA Sets On/Off mode (see DDC operating modes)Enables On/Off modeDisables On/Off mode
AV92 NA Controls occupied/unoccupied or rented/vacant statusSets Microset II to occupied or rented operationSets Microset II to unoccupied or vacant operation
AV93 NA Controls occupied/unoccupied or rented/vacant statusSets Microset II to occupied or rented operationSets Microset II to unoccupied or vacant operation
AV94 NA Controls occupied/unoccupied or rented/vacant statusSets Microset II to occupied or rented operationSets Microset II to unoccupied or vacant operation
AV95 NA Controls occupied/unoccupied or rented/vacant status Sets Microset II to occupied or rented operationSets Microset II to unoccupied or vacant operation
AV96 NA Controls occupied/unoccupied or rented/vacant status Sets Microset II to occupied or rented operationSets Microset II to unoccupied or vacant operation
1) , 3) , 5)
DDC can write to these BVs. They are also affected by the occupant selection of fan speed. Only one of these BVs can be ON at once; otherwise, the fan displays high fan status. When fan is OFF, these BVs are OFF.
2) , 4) , 6)
Not available in VLC versions 1.06c and earlier. See “Compatibility with Earlier Version VLCs”
devices/microset/av-bv-assignments.txt · Last modified: 2011/01/01 18:18 by dsbach