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Modbus TCP/IP Driver Manual
Page 13 of 23
6.3 Server Side Map Descriptor Parameters
6.3.1 FieldServer Specific 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
Section 4
Data_Array_Offset
Starting location in Data Array.
0 to (Data_Array_Length -1) as specified
in Section 4
Function
Function of Client Map Descriptor.
Passive, server
6.3.2 Driver Specific Map Descriptor Parameters
Column Title
Function
Legal Values
Node_Name
The name of the Node being
represented.
One of the Node names specified in
Section 6.2
Data_Type11
Specify memory area.
Address_Type = ADU
Coil, Discrete_Input, Input_Register,
Holding_Register, Single_Coil,
Single_Register, Slave_ID (Section 6.3.4)
Address_Type = PDU
FC01, FC02, FC03, FC04,
FC05, FC06, FC15, FC16
Address_Type = Modicon_5digit
- (Dash), Single_Register, Single_Coil
All Address_Type
Device_ID (Appendix A.5.1)
Address
Starting address of read block.
Address_Type = ADU
1-65536
Address_Type = PDU
0-65535
Address_Type = Modicon_5digit
40001, 30001, etc.
Length*
Length of Map Descriptor.
Address_Type = ADU
1-65536
Address_Type = PDU
1-65536
Address_Type = Modicon_5digit
1-9999
Data_Array_Low_Scale*
Scaling zero in Data Array.
Any signed 32 bit integer in the range:
-2147483648 to 2147483647, 0
Data_Array_High_Scale*
Scaling max in Data Array.
Any signed 32 bit integer in the range:
-2147483648 to 2147483647, 100
Node_Low_Scale*
Scaling zero in connected
Node.
Any signed 32 bit integer in the range:
-2147483648 to 2147483647, 0
Node_High_Scale*
Scaling max in connected
Node.
Any signed 32 bit integer in the range:
-2147483648 to 2147483647, 100
11 Optional only for Modicon_5digit addressing, and only if Single writes do not need to be forced.
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