FieldServer FS-8700-08 - Manual (Page 11)

FS-8700-01 Modbus RTU/ASCIIFS-8700-01_Modbus_RTU.doc Driver Manual Page 11 of 21
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6 CONFIGURING THE FIELDSERVER AS A MODBUS RTU OR MODBUS ASCII SERVER
For a detailed discussion on FieldServer configuration, please refer to the FieldServer Configuration Manual. The
information that follows describes how to expand upon the factory defaults provided in the configuration files
included with the FieldServer (See “.csv” sample files provided with the FieldServer).
This section documents and describes the parameters necessary for configuring the FieldServer to communicate
with a Modbus RTU or Modbus ASCII Client.
The configuration file tells the FieldServer about its interfaces, and the routing of data required. In order to enable
the FieldServer for Modbus RTU or Modbus ASCII communications, the driver independent FieldServer buffers
need to be declared in the “Data Arrays” section, the FieldServer virtual Node(s) needs to be declared in the
“Server Side Nodes” section, and the data to be provided to the clients needs to be mapped in the “Server Side
Map Descriptors” section. Details on how to do this can be found below.
Note that in the tables, * indicates an optional parameter, with the bold legal value being the default.
6.1 Server Side Connection Parameters
Section Title
Connections
Column Title
Function Legal Values
Port
Specify which port the device is connected
to the FieldServer
P1-P8, R1-R2
8
Baud* Specify baud rate 110 – 115200, standard baud rates only, 9600
Parity* Specify parity Even, Odd, None
Data_Bits* Specify data bits 7, 8
Stop_Bits* Specify stop bits 1, 2
Protocol Specify protocol used
Modbus RTU
Modbus_RTU
Modbus ASCII
MB_ASCII
Example
Change protocol to MB_ASCII to use Modbus ASCII protocol
// Server Side Connections
Connections
Port , Baud , Parity , Data_Bits , Stop_Bits , Protocol
P1 , 9600 , None , 8 , 1 , Modbus_RTU
8 Not all ports shown are necessarily supported by the hardware. Consult the appropriate Instruction manual for details of the ports available
on specific hardware.