User's Manual

Table Of Contents

COM port

The COM port needs to be Enabled and a Protocol needs to be selected to transfer any data. "Trans-

parent" type of COM protocol is dedicated for Bridge mode purposes. This protocol transfers data

between the COM port and the RipEX2 network transparently. Any other Protocol can be selected

when needed.

When the "Transparent" protocol is selected, all frames received from the COM port are broadcasted

over the radio channel and transmitted to all COM ports on all radio modems within the network. If the

remote COM port is also configured for "Transparent" protocol, the received data are transparently

transmitted over the COM port.

Terminal Servers

Behavior of Terminal Servers is similar to COM port. "Transparent" protocol needs to be selected when

transparent data transfer to whole network (broadcasts) is needed. The other protocol types can be

used for "Router mode" type of addressed communication.

5.1.1. Functionality example

In the following, common acronyms from SCADA systems are used:

• FEP - Front End Processor, designates the communication interface equipment in the center

• RTU - Remote Telemetry Unit, the terminal SCADA equipment at remote sites

The single digits in illustrations are “site names” and do not necessarily correspond with actual addresses

of both the RipEX2's and SCADA equipment. Address configuration examples are given in the Sec-

tion 5.1.2, “Configuration examples”.

Step 1

Polling cycle starts:

FEP sends a request packet for RTU C through COM to

the connected RipEX2.

Step 2

RipEX2 FEP broadcasts this packet on Radio channel.

RipEX2 C and RipEX2 A receive this packet.

RipEX2 B does not receive this packet, because it is not

within radio coverage of RipEX2 FEP .

RipEX2 in detail