SCADA Communications P54x/EN SC/La4
MiCOM P543, P544, P545 & P546
(SC) 13-15
SC
The next cell sets the device address on the DNP3.0 network:
RP1 Address
232
Up to 32 devices can be connected to one DNP3.0 spur, and therefore it is necessary for
each device to have a unique address so that messages from the master control station are
accepted by only one device. DNP3.0 uses a decimal number between 1 and 65519 for the
device address. It is important that no two devices have the same address. The address is
then used by the DNP3.0 master station to communicate with the relay.
The next cell sets the baud rate to be used:
RP1 Baud Rate
9600 bits/s
DNP3.0 communication is asynchronous. Six baud rates are supported by the relay
‘1200bits/s’, ‘2400bits/s’, ‘4800bits/s’, ’9600bits/s’, ‘19200bits/s’ and ‘38400bits/s’. It is
important that whatever baud rate is selected on the relay is the same as that set on the
DNP3.0 master station.
The next cell controls the parity format used in the data frames:
RP1 Parity
None
The parity can be set to be one of ‘None’, ‘Odd’ or ‘Even’. It is important that whatever parity
format is selected on the relay is the same as that set on the DNP3.0 master station.
An optional fiber optic card is available in the MiCOM P54x to allow optical connection to the
IEC 60870-5-103 communication to be made over an optical connection. When fitted, it
converts between EIA(RS)485 signals and fiber optic signals and the following cell is visible
in the menu column:
RP1 Physical link
Copper
The default setting is to select the electrical (copper) connection. If the optional fiber optic
interface is fitted to the relay, then this setting can be changed to ‘Fiber optic’. This cell is
invisible if a second rear communications port or an Ethernet card is fitted, as they are
mutually exclusive and occupy the same physical location.
The next cell down the column sets the time synchronization request from the master by the
relay:
RP1 Time Sync.
Enabled
The time synchronization can be set to either enabled or disabled. If enabled it allows the
DNP3.0 master to synchronize the time.
Analogue values can be set to be reported in terms of primary, secondary or normalized
(with respect to the CT/VT ratio setting) values:
Meas Scaling
Primary
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