User Guide
FS-8700-15 Modbus Daniels Manual            Page 1 of 7 
1.   Modbus Daniels Description 
The Modbus Daniels driver allows the FieldServer to transfer data to and from devices over 
either RS-232 or RS-485 using Modbus Daniels protocol. The FieldServer can only emulate a  
Client. 
Modbus Daniels is an inclusion into Modbus ASCII, allowing floats to be used. Modbus Daniels 
is designed to support floats in the address range 7000 to 7999. The "Double" data type is not 
supported. Other standard Modbus data types are supported. 
Max Nodes Supported 
FieldServer Mode  Nodes  Comments 
Client 255 
The maximum achievable number of devices on the 
network may be less depending on device loading and 
network speed characteristics. Only one client device 
allowed on multidrop systems. 
2.  Driver Scope of Supply 
2.1.  Supplied by FieldServer Technologies for this driver 
FieldServer Technologies 
PART # 
Description 
FS-8915-10  UTP cable (7 foot) for RS_232 use 
FS-8917-01  RJ45 to DB25M connection adapter 
SPA59132  RS-485 connection adapter 
- Driver Manual. 
2.2.  Provided by the Supplier of 3
rd
 Party Equipment 
2.2.1. Required 3
rd
 Party Configuration 
The Modbus Daniels device must be set to use Modbus ASCII protocol. 
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldserver.com 
Tel: (408) 262-2299 Fax: (408) 262-9042 Toll_Free: 888-509-1970 email: support@fieldserver.com 









