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C.6 BACnet Objects Supported

Present Value Access

The Present Value (PV) of BACnet objects can always be read. In addition, some PVs can be written or commanded. A

commandable PV is similar to writing the value, but the value is actually written into a priority array. The value occupying

the highest priority in the array will be used by the bypass. The convention for showing how the PV is accessed is shown in

Table C.2 and will be noted for the PV of each object.

Table C.2 Present Value Access Values

PV Access Name Description

C Commandable Value written to a priority array. The highest priority value in the array is then written to the bypass.

R Readable Value is read-only

W Writable Value written to the bypass

Supported Properties of Objects

Table C.3 Object Properties

Property

Object Type

Device

Analog

Input

Analog

Output

Analog

Value

Binary

Output

Binary

Output

Binary

Value

Object_Identifier Yes Yes Yes Yes Yes Yes Yes

Object_Name Yes Yes Yes Yes Yes Yes Yes

Object_Type Yes Yes Yes Yes Yes Yes Yes

System_Status Yes – – – – – –

Vendor_Name Yes – – – – – –

Vendor_Identifier Yes – – – – – –

Model_Name Yes – – – – – –

Firmware_Revision Yes – – – – – –

Protocol_Version Yes – – – – – –

Protocol_Revision Yes – – – – – –

Protocol_Services_Supported Yes – – – – – –

Protocol_Object_Types_Supported Yes – – – – – –

Object_List Yes – – – – – –

Max_ADPU_Length_Accepted Yes – – – – – –

Segmentation_Supported Yes – – – – – –

Local_Time Yes – – – – – –

Local_Date Yes – – – – – –

ADPU_Timeout Yes – – – – – –

Number_Of_ADPU_Retries Yes – – – – – –

Max_Masters Yes – – – – – –

Max_Info_Frames Yes – – – – – –

Device_Address_Binding Yes – – – – – –

Database_Revision Yes – – – – – –

Present_Value – Yes Yes Yes Yes Yes Yes

Status_Flags – Yes Yes Yes Yes Yes Yes

Event_State – Yes Yes Yes Yes Yes Yes

Reliability – Yes Yes Yes Yes Yes Yes

Out_Of_Service – Yes Yes Yes Yes Yes Yes

Units – Yes Yes Yes – – –

Priority_Array – –

Yes

<1>

Yes

<1>

– Yes Yes

Relinquish_Default – –

Yes

<1>

Yes

<1>

– Yes Yes

Polarity – – – – Yes Yes –

C.6 BACnet Objects Supported

YASKAWA ELECTRIC SIEP YAIZ1B 01D YASKAWA AC Drive – Z1000 Bypass Technical Manual

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BACnet

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