MDS 05-4055A01, Rev. A
MDS entraNET 900 System Guide (Preliminary)
39
2.5.5 Point-to-Multipoint Serial-to-Serial Application
Example
The operation and data flow for this mode is very similar to
Point-to-Point serial-to-serial application, except that it uses multicast
addressing. The primary difference is that data presented at the Access
Point’s
COM
port will be packetized and sent via UDP to all of the
Remotes. Upon receiving the packet all of the Remotes strip the data out
of the UDP packet and send it out their
COM
port. Likewise, data pre-
sented at any of the Remotes’
COM
ports is packetized, sent to the
Access Point, stripped, and sent out the Access Point’s
COM
port.
Invisible place holder
Figure 2-18. Point-to-Multipoint Serial-to-Serial Application
Diagram
Invisible place holder
192.168.0.3
192.168.0.4
EIA-232
Terminal
or Computer
RTU
RTU
RTU
EIA-232
EIA-232
EIA-232
192.168.0.10
192.168.0.1
192.168.0.2
i
NET 900
Access Point
LA
N
COM
1
COM
2
PW
R
LIN
K
i
NET 900
Remote
LA
N
COM
1
COM
2
PW
R
LIN
K
i
NET 900
Remote
LA
N
COM
1
COM
2
PW
R
LIN
K
i
NET 900
Remote
Table 2-3. Serial Port Application Configuration
MDS entraNET 900
Unit Location
Menu Item
Setting
Access Point (COM2)
1
Status
Enabled
Baud Rate
9600 (Example)
Seamless Mode
Disabled
Flow Control
Disabled
IP Protocol
UDP
Send to Address
224.254.1.1—
Multicast Address
2
Send to Port
30011
Receive on Port
30011
Receive on Address
0.0.0.0 (Not applicable)
Remote Units (COM2)
1
Enable
Enabled
Baud Rate
2,400 (Example)
Seamless Mode
Disabled
Flow Control
Hardware (Example)
IP Protocol
UDP
Send to Address
192.168.0.1
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