User's Manual

Page 9
M Series Data Radio – User Manual
© Copyright 2004 Trio DataCom Pty. Ltd.
Part C – Applications
Part C – Applications
Generic Connectivity
The M Series has been designed for SCADA and telemetry
applications, and any other applications that use an ASCII
communications protocol, and which connect physically using the
RS232 interface standard (although converters can be used to adapt
other interfaces such as RS422/485, RS530/V35, G703 etc).
Any protocol that can be displayed using a PC based terminal
program operating via a serial communications port is suitable for
transmission by the M Series radio modems.
An ASCII protocol is any that consists of message strings formed
from ASCII characters, that being defined as a 10 or 11 bit block
including start and stop bits, 7 or 8 data bits and optional parity bit(s).
Port set-up dialog that includes the expressions “N,8,1”, or E,7,2” or
similar indicate an ASCII protocol.
Most of the dominant telemetry industry suppliers utilise proprietary
ASCII protocols, and also common 'open standard” industry protocols
such as DNP3, MODBUS, TCP/IP, and PPP. These are all ASCII
based protocols.
Industries and Applications
The M Series products are widely used in point-to-point and point-to-
multipoint (multiple access) applications for remote interconnection of
PLCs, RTUs, dataloggers, and other data monitoring and control
devices - including specialist utility devices (such as powerline
ACRs). In addition, other applications such as area wide security and
alarm systems, public information systems (traffic flow and public
signage systems) and environmental monitoring systems.
Application Detail
SCADA Systems
This is where one or more centralised control sites are used to monitor
and control remote field devices over wide areas. Examples include
regional utilities monitoring and controlling networks over entire shires
or a greater city metropolis. Industry sectors include energy utilities
(gas and electricity distribution), water and sewerage utilities,
catchment and environment groups (rivers, dams and catchment
management authorities).
Telemetry Systems
Dedicated telemetry control systems interconnecting sequential
devices either where cabling is not practical or distances are
considerable.
Examples include:
• ore conveyor or slurry pipeline systems
• simple water systems (pump and reservoir interlinking)
• broadcast industry (linking studio to transmitter) etc.
Information Systems
Public Information systems such as freeway vehicle flow, travel time
monitoring, feedback signage, parking signage systems and
meteorological stations etc.