RST Instruments RSTAR L900 Series, Инструкция по эксплуатации

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L900 RSTAR Array Radio Series System
Instruction Manual
ELM0077I
RST Instruments Ltd. Page 1
1 I
NTRODUCTION
F
IGURE
1-1 RSTAR C
ONFIGURED
D
ATA
L
OGGERS
(L
EFT
)
AND
RTU H
UB
(R
IGHT
)
1.1 O
VERVIEW
The RSTAR Array Radio Series System is a communications system that enables
wireless data acquisition from RST DT series data loggers. DT series data loggers
(Node Loggers) equipped with L900 radio kits wirelessly transmits sensor
measurements to an L900 Remote Terminal Unit (RTU). Refer to Figure 1-1.
The RTU stores the last readings sent from all Node Loggers and relays the
information over RS-232 or USB communications. The RTU also controls the reading
interval of Node Loggers and synchronises the clocks of all the Node Loggers.
The RTU will only store the most recent readings from the Node Loggers. When
purchased as part of a FlexDAQ Hub logger, Node Logger data is automatically
transferred and stored in the Hub Logger each time the network takes a reading.
Sensor data is stored in three locations: the Node Logger, the Hub Logger, and the
base station computer.
1.2 RSTAR C
OMMUNICATIONS
P
RINCIPLES
RSTAR networks are star type. Node data loggers send and receive data from only
one Hub RTU.