34 S&C Instruction Sheet 1074-530
SpeedNet Client Tool
Multiple SCADA
Masters
SpeedNet ME Radios have a feature that allows multiple SCADA masters that use the
same SCADA address to connect to a single SpeedNet ME Radio. When this feature is
enabled, the connected SpeedNet ME Radio continually monitors DNP traffic. For multiple
SCADA masters using the same SCADA address, the SpeedNet ME Radio will consider
the master to be the device that sent the most recent data packet. If the active SCADA
master experiences a failure, the SpeedNet ME Radio will automatically forward packets
from the backup SCADA master.
Configuring this feature is simple. When building the SCADA table using the UDP/IP
transport option, each SCADA master is assigned the same SCADA address, and each
SCADA master has a unique IP address.
For example, assume there are two SCADA master devices, one with an IP address of
192.168.200.20 (primary SCADA master) and one with an IP address of 192.168.200.30
(secondary SCADA master). To create the table entry for the primary SCADA master,
enter 192.168.200.20 into the
IP Address
field. Enter 25 into the
SCADA Address
field.
To create the table entry for the secondary SCADA master, enter 192.168.200.30 into the
IP Address
field. Enter 25 into the
SCADA Address
field.
Interfaces Window,
Serial Port Tab
Figure 56. Serial Port interface configuration window.
The
Serial Port
tab is only available when DNP is selected as the serial port mode. As
shown in Figure 56, the
Serial Port
tab is used to configure the communication parameters
for the SpeedNet ME Radio’s serial port. The following parameters can be configured:
•
Baud Rate
—This determines the bit rate used for serial communications. The default
value is 9600.
•
Data Bits
—This determines the number of data bits within each character. The de-
fault value is 8.
•
Parity
—This determines the setting for the parity bit within each character. The de-
fault value is none.
•
Stop Bits
—This determines the number of stop bits that follow each character. The
default value is 1.
•
Flow Control
—This configures the type of flow control that is used for serial data
communication. The default value is none.
