D05125R01.20
F-PRO 116 User Manual
3-3
Com Port 2 RS-485
3.3 Accessing the
Relay’s SCADA Service
s
The relay supports IEC 60870-5-103 slave, Modbus slave and DNP 3.0 Serial SCADA protocols. The
Modbus implementation supports both Remote Terminal Unit (RTU) binary and ASCII modes and
is available through a direct RS485 serial link.
The relay Port 2 is dedicated for use with DNP3.0, Modbus slave and IEC 60870-5-103 slave
protocols. The serial Port uses standard RS-485 signaling. An external RS-485 <-> RS-232 converter
must be used to connect to an RS-232 network.
Figure 3.2: RS485 Connection diagram
Complete details on the Modbus and IEC 60870-5-103 protocol services can be found in the
Appendices. F
or details see “
Modbus RTU/ ASCII
Communication Protocol” in
“IEC 103
Device Profile” in
and “DNP 3.0 Device Profile” in
Protocol Selection
To select the desired SCADA protocol, go to F-PRO Offliner SCADA
communication section. Select the desired SCADA protocol and set the
corresponding parameters.
Communication
Parameters
The serial port's communication parameters are set in the F-PRO Offliner
SCADA communication section. Both the baud rate and the parity bit can
be configured. The number of data bits and stop bits are determined
automatically by the selected SCADA protocol.
“
Modbus ASCII/ Modbus RTU/ IEC 60870-5-103
/ DNP 3.0 Serial”
uses 8
data bits and 1 stop bit. If used with parity (even or odd), there is one
parity extra bit.
IED1
IED 2
IED 3
31
PC with RS232
RS485
to
RS232
Converter
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