RACOM RipEX 1.12.0, Руководство пользователя, Страница: 120 / 189

other special protocol daemon on Ethernet like Modbus TCP etc. The datagram is then processed ac-
cordingly to the respective settings.
RipEX uses a unique, sophisticated protocol on Radio channel. This protocol ensures high probability
of data delivery. It also guarantees data integrity even under heavy interference or weak signal conditions
due to the 32 bit CRC used, minimises the probability of collision and retransmits frame when a collision
happens, etc., etc. These features allow for the most efficient SCADA application arrangements to be
used, e.g. multi-master polling and/or spontaneous communication from remote units and/or parallel
communication between remote units etc.
Note
These Radio protocol features are available only in the Router mode. The Bridge mode
is suitable for simple Master-Slave arrangement with a polling-type application protocol. 1.
2. All timeouts in parameters described below are calculated from time, when packet is
sent into COM driver, i.e. it includes the transfer time of the packet. Take it into account
especially when there is a low Baud rate set in COM setings.
Common parameters
The parameters described in this section are typical for most protocols.
There is only a link to them in description of the respective Protocol.
Mode of Connected device
List box: Master, Slave
Default = Master
Typical SCADA application follows Master-Slave scheme, where the structure of the message is different
for Master and Slave SCADA units. Because of that it is necessary to set which type of SCADA unit is
connected to the RipEX.
Important
For SCADA Master set Master, for SCADA Slave set Slave.
• Master
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
RipEX Radio modem & Router – © RACOM s.r.o. 120
Advanced Configuration