8
After executing above operations the module returns to the stand-by mode.
The main purpose of the
Transmission timer (T2)
is metering the transmission
cycles for sending the content of internal logger. The timer initializes the module wake
up process, starts the data transmission and initializes the readout of signal values on
the module inputs. However, the timer does not check alarms on the analog inputs.
The activity period of the module amounts up to 2 minutes. After this time, the module
is obligatory put into stand-by mode. This means that when are troubles with SMS and
data sending, it may happen that the configured rules are not be fully processed. For
example, it may happen when there are several rules to be processed and each of
them requires the transmission repetition. When the module has to send the content of
the logger, the activity period is extended by 5 minutes.
The proper configuration of the timers enables the precise programming of the activity
as well as stand-by cycles of the module. It helps to optimise the energy consumption,
which is extremely important due to the extending the time of battery life.
3.2.4. The internal logger
The
MT-703
telemetry module is equipped with programmable logger which can collect
up to 576 data records. This allows to store the 24 hours measurements, executed
every 5 minutes. The measured data are entered to the register synchronously with the
ticks of one of the module timers. All variable values marked for recording in the
configuration are saved. Entries in the logger have a timestamp provided by the
module real time clock (RTC). To achieve the coherence of recorded data it is
recommended the RTC should operate in UTC time scale.
The data stored in the logger are transmitted to the IP address given in the
configuration. The data receipt confirmation causes removing them from the logger
memory.
ATTENTION!!!
The recording function of the module is available only in GPRS
transmission mode.
3.2.5. Real time clock
The
MT-703
module has its own R
eal Time Clock
(
RTC
).
This clock provides time reference for the operating cycles of the device, for the timers
as well as for setting timestamps in measurement results which are stored in the
logger. Incorrect setting of the clock may result in faulty marking of the results, thus
causes the possible loss of important data. That’s why it is recommended to set the
clock to UTC time, not to the local time zone.
ATTENTION!!!
The setting of the real time clock must be updated if the module has not
been powered for more than 2 minutes.
The method of RTC setting is described in documentation of the
MTM
program and in
MT Spooler
User Manual.
