4
1.
Description of working of the modem
The modem is intended for remote communication with data loggers ATV, ATX, ATP via cellular
network (GSM). In light of a customer, this way of communication offers the same functions like a
direct connection between the data logger and the computer (for example by using COM/USB
adapter).
The modem can be set and controlled with a program for data loggers and also with SMS messages
(but with restrictions). It is possible to select phone numbers, from which SMS messages are
accepted by the modem.
These are possibilities of usage the program for data loggers:
downloading data from the connected data logger
reading of current values from the connected data logger
setting up the modem locally via RS232 link
setting up the modem remotely via GPRS networking
setting up the connected data logger remotely
These are possibilities of usage the SMS messages:
sending of alarm SMS messages to preconfigured phone numbers (in case of beyond
the set alarm limits for measured values and binary inputs or in case of error
conditions)
getting of current values from the connected data logger
setting up the modem remotely (with restrictions)
Working principle for the modem with the data logger (block diagram)
Logge
rRxxx
x
Sxxxx
COM Adapter
GPRS Modem
SMS
Current values
Alarms
Setting up a modem
Logger
Gxxxx
Feeder cable and
communication
cable
M2M GPRS
M2MTalk server
P
C
P
C
INTERNE
T
Downloading data from
logger
Showing of current values
Setting up a logger
Setting up a modem
