User Manual
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
iNET 900
Access Point
L
A
N
C
O
M
1
C
O
M
2
P
W
R
L
I
N
K
iNET 900
Remote
L
A
N
C
O
M
1
C
O
M
2
P
W
R
L
I
N
K
iNET 900
Remote
L
A
N
C
O
M
1
C
O
M
2
P
W
R
L
I
N
K
iNET 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