SCADA Master always sends addressed messages to Slaves. The way of addressing is different
from SCADA protocol to SCADA protocol, so this is one of the main reasons why an individual
Protocol utility in RipEX for each SCADA protocol has to be used.
Broadcast
List box: On, Off
Default = Off
Some Master SCADA units sends broadcast messages to all Slave units. SCADA application
typically uses a specific address for such messages. RipEX (Protocol utility) converts such
message to a customized IP broadcast and broadcasts it to all RipEX units resp. to all SCADA
units within the network.
If
On
, the address for broadcast packets in SCADA protocol has to be defined:
Broadcast address format
- List box Hex, Dec - format in which broadcast address is
defined.
Broadcast address
- address in the defined format (Hex, Dec)
Address translation
List box: Table, Mask
Default = Mask
In a SCADA protocol, each SCADA unit has a unique address, a "Protocol address". In RipEX
Radio network, each SCADA unit is represented by an IP address (typically that of ETH in-
terface) and a UDP port (that of the protocol daemon or the COM port server to which the
SCADA device is connected via serial interface).
A translation between "Protocol address" and the IP address & UDP port pair has to be done.
It can be done either via Table or via Mask.
So SCADA message received from serial interface is encapsulated into a UDP/IP datagram,
where destination IP address and destination UDP port are defined according the settings
of Address translation.
Mask
Translation using Mask is simpler to set, however it has some limitations:
− all IP addresses used have to be within the same network, which is defined by this
Mask
− the same UDP port is used for all the SCADA units, which results in the following limit-
ations:
− SCADA devices on all sites have to be connected to the same interface (COM1 or
COM2)
− only one SCADA device to one COM port can be connected, even if the RS485 inter-
face is used
Base IP
Default = IP address of ETH interface
When the IP destination address of UDP datagram, in which serial SCADA message
received from COM1(2) is encapsulated, is created, this Base IP is taken as the basis
and only the part defined by Mask is replaced by 'Protocol address'.
Mask
Default = 255.255.255.0
A part of Base IP address defined by this Mask is replaced by 'Protocol address'. The
SCADA protocol address is typically 1 Byte, so Mask 255.255.255.0 is most frequently
used.
UDP port (Interface)
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© RACOM s.r.o. – RipEX Radio modem & Router
Advanced Configuration
Summary of Contents for RipEX
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