RACOM M!DGE2, Руководство пользователя

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• Master
The SCADA Master always sends addressed messages to Slaves. Addressing is different for each
SCADA protocol, so this is one of the main reasons why an individual Protocol server in each Unit
for each SCADA protocol has to be used.
○
Broadcast
List box: On, Off
Default = Off
Some Master SCADA units send broadcast messages to all Slave units. SCADA applications
typically use a specific address for such messages. RipEX (Protocol utility) converts such messages
into a customized IP broadcast and broadcasts it to all RipEX units resp. to all SCADA units within
the network.
Note
Broadcasts in the cellular network are not possible, thus setting of broadcast functionality
is not allowed with M!DGE units.
If On , the address for broadcast packets in the SCADA protocol has to be defined:
■ Broadcast address format - List box Hex, Dec - format in which the 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 a cellular
mobile network, each SCADA unit is represented by an IP address (typically that of the ETH inter-
face) 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 the "Protocol address" and the IP address & UDP port pair has to be done.
It can be done either via Table or Mask.
Hence, a SCADA message received from the serial interface is encapsulated into a UDP/IP data-
gram, where the destination IP address and the destination UDP port are defined according to the
settings of the Address translation.
■
Mask
Translation using the 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:
− SCADA devices on all sites have to be connected to the same interface
− only one SCADA device can be connected to one COM port
• Base IP
Default = IP address of the ETH interface
When creating the IP destination address of UDP datagram, in which the serial SCADA
message received from COM is encapsulated, this is created, this Base IP is taken as the
basis and only the part defined by the Mask is replaced by the 'Protocol address'.
• Mask
Default = 255.255.255.0
A part of the Base IP address defined by this Mask is replaced by the 'Protocol address'. The
SCADA protocol address is typically 1 byte, so Mask 255.255.255.0 is most frequently used.
• UDP port (Interface)
List box: COM, Manual
This UDP port is used as the destination UDP port in the UDP datagram in which the serial
SCADA packet received from COM1 is encapsulated. The default UDP port for COM can be
M!DGE2 GPRS/UMTS/HSPA+/LTE router – © RACOM s.r.o. 54
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