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FS-8700-02 Modbus Plus
2. FieldServer as a Modbus Plus Client
2.1 Hardware Connections
It is possible to connect a Modbus RTU device to any of the eight RS232 ports or two RS485
ports. These ports just need to be configured for Modbus RTU in the configuration file.
Configure the PLC according to manufacturer's instructions.
2.2 Configuration File Structure
Refer to section 4.1 of the Instruction Manual for a description of the operation principle
of the FieldServer. The following tables describe parameters that need to be filled out in
the configuration file. For convenience, a few example parameters already exist in the
supplied PRIMSERV.CSV and SECDSERV.CSV files.
Note that * indicates an optional parameter, with the bold legal value being the default.
2.2.1 Data Arrays
Section Title
Data_Arrays
Column Title
Data_Array_Name
Data_Format
Data_Array_Length
2.2.2 Client Side Connections
Section Title
Connections
Column Title
Adapter
2.2.3 Client Side Nodes
Section Title
Nodes
Column Title
Node_Name
Route
Protocol
Note 1: Refer to the Modicon user guide 890 USE 102 00 for details on path
establishment. In general, the first number is the Destination BM85 MAC address,
the second number represents the internal path, and the third number is the
destination node. This varies if the BM85 is not connected to the FieldServer.
FieldServer Technologies 1991 Tarob Court, Milpitas, California 95035 (408) 262-2299 fax: (408) 262-9042
Visit our website: www.fieldserver.com
Function
Provide name for Data Array
Provides data format
Number of Data Objects
Function
Adapter name
Function
Provide name for node
Modbus Plus Path
Specify protocol used
E-mail: support@fieldserver.com
Page 3
Driver Manual
Legal Values
Up to 15
alphanumeric
characters
INT16, INT32, BIT,
FLOAT
1-10,000
Legal Values
MBP
Legal Values
Up to 32
alphanumeric
characters
Note 1*
Modbus Plus
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