FieldServer FS-8704-06 - Manual (Page 10)

FS-8704-06 BACnet IP Driver Manual Page 10 of 57
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5.3.2 Driver Specific Map Descriptor Parameters
Section Title
Map Descriptors
Column Title
Function Legal Values
Node_Name Name of remote Server Node.
One of the Node_Names
specified in Section 5.2
Object_Type
(Alias = Data_Type) Type of object. Refer to Appendix D.1 for more
information. AI, AO, AV, BI, BO, BV, MI, MO,
MV, NC
Object_Instance
(Alias = Address)
Instance of the object on the device. 0, 1, 2, 3, …4194303
Property The BACnet property to be read. Refer to Appendix D.3
Data_Array_Low_Scale* Scaling zero in Data Array -32767 to 32767, 0
Data_Array_High_Scale* Scaling max in Data Array -32767 to 32767, 100
Node_Low_Scale* Scaling zero in Connected Node -32767 to 32767, 0
Node_High_Scale* Scaling max in Connected Node -32767 to 32767, 100
Length*
Used to create an array of sequential
Object_Instances on an Object_Type. 1 to max point count of the
FieldServer, 1
Array_Index*
When referencing Multistate properties, allows
the user to specify the index of the property to
be read. If 1 is specified, the first one will be
read, if 2 is specified, the second will be read,
etc. If 0 is specified, the driver will return the
total number (count) of array items linked to
the property. If the parameter is not specified,
a list of all items will be returned. Refer to
Appendix A.3
0 to max number of array items
in the BACnet Property, -
Write_Priority*
Allows the driver to specify the write priority
used to write an output.
1..16, 16
Linked_Map_Descriptors*
This parameter allows the linking of Map
Descriptors to an active read or write Map
Descriptor
in order to construct a
ReadPropertyMultiple or WritePropertyMultiple
transaction. Refer to Appendix A.10
The name of a previously defined
active Map Descriptor, -
Length*
When the optional Length parameter is set to a
value N, the Map Descriptor will include N
consecutive
instances of the specified
Object_Type. For example, if a Map Descriptor
specifies Object_Type, Address 4 and Length 3,
this means that the AO instances 4, 5 and 6 will
be included in the read or write transaction. The
corresponding Data Array values are in
consecutive positions in the Data Array, starting
at the specified Data_Array_Offset.
Any positive integer that falls
between the range of the
Data_Array_Offset
and the
Data_Array_Length as specified
in section 4, -
Refer also to Appendix A.10