Racom RIPEX-154 用户手册

Step 3

RipEX3 and RipEX1 send the received packet to their
COM1 and COM2.
Packet is addressed to RTU3, so only RTU3 responds.
RipEX1 is set as a repeater, so it retransmits the packet
on Radio channel. Packet is received by all RipEXes.

Step 4

RipEX2 sends repeated packet to its COM1 and COM2.
RTU2 doesn’t react, because the packet is addressed to
RTU3.
RipEX3 and FEP’s RipEX do not send the repeated
packet to their COM ports, because it has already been
sent (RipEX3) or received (FEP’s RipEX) on their COM
(anti-duplication mechanism).
RTU3 sends the reply packet.

Step 5

RipEX3 broadcasts the reply packet from RTU3 on Radio
channel.
Packet is received by RipEX1 and FEP’s RipEX.

Step 6

FEP’s RipEX sends the packet (the reply from RTU3) to
FEP through COM1.
RipEX1 sends this packet to RTU1. RTU1 doesn’t react,
because the packet is addressed to FEP.
RipEX1 repeats the packet on Radio channel.
All RipEXes receive the packet.

Step 7

RipEX2 sends repeated packet to its COM1 and COM2.
RTU2 doesn’t react, because the packet is addressed to
FEP.
RipEX3 and FEP’s RipEXes do not send the repeated
packet to their COM ports, because it has been handled
already.
FEP processes the reply from RTU3 and polling cycle
continues…

RipEX in detail