User Guide
FS -8700-02 Modbus Plus     Driver Manual 
FieldServer Technologies 1991 Tarob Court, Milpitas, California 95035 (408) 262-2299 fax: (408) 262-9042 
Visit our website: www.fieldserver.com E-mail: support@fieldserver.com 
Page  1
1.  Modbus Plus Description  
The Modbus Plus driver allows the FieldServer to transfer data to and from devices using 
Modbus Plus protocol. The FieldServer can emulate either a Server or Client.  
The information that follows describes how to expand upon the factory defaults provided in the 
configuration files included with the FieldServer. 
The FieldServer is shipped with the switches set of a default address of 11. 
Set the Modbus Plus address switches 1--6 to the address in your application. Switches 7 and 8 
are not used. 
Switch 1 is the least significant bit of the address. Switch 6 is the most significant bit. The address 
will be one higher than the binary value you set into the switches. 
1.1 Hardware/Software  
Supplied by FieldServer 
FieldServer 
Technologies PART # 
DESCRIPTION 
FS-8915-01  Adapter Card, Modbus Plus, Single Port. User must supply 
Modbus Plus cables and connectors, including termination 
connectors as documented by Group Schneider/Modicon 
Provided by user 
PART #  DESCRIPTION 
  Refer to the Drawings in section 3 
1 
  Modbus Plus Client, e.g. Wonderware, Intellution FIX, GE 
Cimplicity, etc.
2 
1 
If FieldServer used as Modbus Plus Client. 
2 
If FieldServer used as Modbus Plus Server. 
Table 1: Modbus Plus Addresses and Switch Settings 
Address 
Switches 6--1   Address 
Switches 6--1   Address 
Switches 6--1 
1  0 0 0 0 0 0  23  0 1 0 1 1 0   45  1 0 1 1 0 0 
2  0 0 0 0 0 1  24  0 1 0 1 1 1  46  1 0 1 1 0 1 
3  0 0 0 0 1 0  25  0 1 1 0 0 0  47  1 0 1 1 1 0 
4  0 0 0 0 1 1  26  0 1 1 0 0 1  48  1 0 1 1 1 1 
5  0 0 0 1 0 0  27  0 1 1 0 1 0   49  1 1 0 0 0 0 
6  0 0 0 1 0 1  28  0 1 1 0 1 1  50  1 1 0 0 0 1 
7  0 0 0 1 1 0  29  0 1 1 1 0 0   51  1 1 0 0 1 0 
8  0 0 0 1 1 1  30  0 1 1 1 0 1  52  1 1 0 0 1 1 
9  0 0 1 0 0 0  31  0 1 1 1 1 0  53  1 1 0 1 0 0  
10  0 0 1 0 0 1  32  0 1 1 1 1 1  54  1 1 0 1 0 1 
11*  0 0 1 0 1 0  33  1 0 0 0 0 0  55  1 1 0 1 1 0 
12  0 0 1 0 1 1  34  1 0 0 0 0 1  56  1 1 0 1 1 1  
13  0 0 1 1 0 0  35  1 0 0 0 1 0  57  1 1 1 0 0 0 









