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FS-8700-73 BACnet MSTP Driver Manual Page 10 of 24
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web: www.fieldserver.com
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4.5. Client Side Map Descriptors
4.5.1. FieldServer Related Map Descriptor Parameters
Column Title Function Legal Values
Map_Descriptor_Name
Name of this Map
Descriptor
Up to 32 alphanumeric
characters
Data_Array_Name
Name of Data Array
where data is to be stored
in the FieldServer
One of the Data Array names
from “Data_Array” section
Data_Array_Offset
Starting location in Data
Array
0 to Data_Array_Length-1 as
specified in “Data_Array”
section
Function
Function of Client Map
Descriptor
Rdbc, Wrbc, Wrbx
4.5.2. Driver Related Map Descriptor Parameters
Column Title Function Legal Values
Node_Name
Name of Node to fetch data
from
One of the node names
specified in “Client Node
Descriptor” above
Data_Type Data type in FieldServer
AI, AO, AV, BI, BV, MI, MO,
MV
9
Object_Instance Address of object 0, 1, 2, 3, …
Property*
The BACnet property to be
read
Present_Value
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
Write_Priority
Allows the driver to specify
the write priority used to write
an output. See also
Appendix B.2
1..16, 16
Custom_Type
This over-writes the
Data_Type with a numerical
value for the Data_Type. e.g.
Analog Value = 2
1..1023
Custom_Prop
This over-writes the Property
with a numerical value for the
property. e.g. Present Value
= 85
1..4194303
4.5.3. Timing Parameters
Column Title Function Legal Values
Scan_Interval* Rate at which data is polled
0-32000, 2s
9
Refer to Appendix A.1 for further information.