Multiple Address Systems (Mas) - GE MDS SD Series Reference Manual

Table 2. Application Types vs. Key Radio Settings (Continued)
Application Protocol
Generic Bridged IP
EThernet (ICMP/TCP/UDP)
Mixed Serial and Modbus RTU & IP
Bridged Ethernet
Report by Exception Serial and/or IP
(see Notes column) Data
Single Poll Multiple Serial and/or IP
Response Data
8
Radio
Mode
Packet
Packet
Packet
Packet

Multiple Address Systems (MAS)

This is a very common application for the transceiver. It consists of a
central master unit and several associated remote units as shown in
Figure 4. An MAS network provides communication between a central
host computer and remote terminal units (RTUs) or other data collection
devices in the field. Often, such a system is used to carry telemetry data
to and from widely separated remote radios.
Typical MAS applications may be for automatic, remote monitoring of
gas wells, water tank levels, electric power distribution systems, and
similar control and measurement functions.
RTU
REMOTE RADIO
RTU
REMOTE RADIO
Figure 4. Typical MAS Point-to-Multipoint Network
SD Series Ref. Manual (Packet & Transparent Mode)
AES CSMA (LBT)
ON or OFF Listen on RX
ON or OFF Listen on RX
ON or OFF Listen on
TX/RX
ON or OFF Listen on RX
(see Notes
column)
Invisible place holder
MASTER STATION
HOST SYSTEM
Multihost Notes
OFF
Optional ON if messages
(see Notes
are one-to-one;
column)
OFF otherwise.
Collisions
expected
OFF Results will vary;
does not follow
polled model.
OFF It is recommended
that responses be
staggered using
the LBT
parameters.
REMOTE RADIO
RTU
RTU
REMOTE RADIO
OR: SDA-Augmented
Master Station
MDS 05-4846A01, Rev. C
.