5. OPERATION
A device maintains communication via GSM-GPRS network. If any problem follows a
device automatically switch to SMS mode (if this mode has been programmed
before-See chapter 7 “Programmable parameters”). As a result the transmitter may
be used only at the territory covered with mobile phone operator network.
If status of inputs is the same as programmed one (NO or NC) a device stays
in a rest. Change of status on any input results in immediate signal transmitting of
this event by the device.
Note :
Each device input (from IN1 till IN8) may be individually defined as on open one
(NO) or closed one (NC). It means that when in NO, input shorting will be an active
state and, a non-shorting will be an active state in NC.
To avoid an excessive cost of use related in particular to false alarms a device
possesses a programmable analysis of inputs.
All inputs respond only to states change which means that transmitting will
follow only if an active state is on input and maintains during programmed minimum
time. Maintenance of active state longer than a minimum time will result in single
indicating. Another input activation (another transmitting) is possible only after
input reached based state.
Number of messages sent in SMS mode is limited (limit includes also text massages
or answers to orders sent by user).This function provides for cost reduction by
limiting messages e.g. in case of damage of sensor connected to any input. After
passage of programmed time new messages will be sent but only in a number
determined by the user.
Text message on events sent to private phone numbers may be edited.
All programmable parameters are saved in memory and in case of voltage
drop that are not lost. Supply of power starts the transmitter with saved settings.
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