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 interface)
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 limitations:
− 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 interface
is used
•
Base IP
Default = IP address of ETH interface
When the IP destination address of UDP datagram, in which serial SCADA message re-
ceived 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)
List box: COM1,COM2, TS1-TS5, TCPM1, Manual.
This UDP port is used as the destination UDP port in UDP datagram in which serial
SCADA packet received from COM1(2) is encapsulated. Default UDP ports for COM1,
COM2 or Terminal servers 1-5 (TS1-TS5) or Modbus TCP (TCPM1) can be used or UDP
port can be set manually. If the destination IP address belongs to a RipEX and the UDP
port is not assigned to COM1(2) or to a Terminal server or to any special daemon running
in the destination RipEX, the packet is discarded.
■
Table
The Address translation is defined in a table. There are no limitations such as when the Mask
translation is used. If there are more SCADA units on RS485 interface, their “Protocol ad-
RipEX Radio modem & Router – © RACOM s.r.o.
116
Advanced Configuration
Содержание RipEX 1.6.0
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